add support for non-static libnetcdff compilation

[bakamotokatas]

Although libnetcdff.so is now supported in the WRF configuration file, it has not been added to WPS. When libnetcdff.a is not present, it needs to be changed to libnetcdff.so every time. Now, with this change, WPS can be compiled with netcdf libraries that are not statically compiled, without making any changes to WPS.

[HathewayWill]

@bakamotokatas I agree this would be more useful and streamlines the building of WRF and WPS

[islas]

This appropriately fixes compilation when using shared libraries of netCDF.

With the current develop (excerpt):

gfortran   -o geogrid.exe cio.o wrf_debug.o bitarray_module.o constants_module.o module_stringutil.o geogrid.o gridinfo_module.o hash_module.o interp_module.o list_module.o llxy_module.o misc_definitions_module.o module_debug.o module_map_utils.o output_module.o parallel_module.o process_tile_module.o proc_point_module.o queue_module.o read_geogrid.o smooth_module.o source_data_module.o \
	/home/aislas/wrf-model/wrf/frame/module_driver_constants.o \
	/home/aislas/wrf-model/wrf/frame/pack_utils.o /home/aislas/wrf-model/wrf/frame/module_machine.o \
	/home/aislas/wrf-model/wrf/frame/module_internal_header_util.o \
	-I/home/aislas/wrf-model/wrf/external/io_netcdf -I/home/aislas/wrf-model/wrf/external/io_grib_share -I/home/aislas/wrf-model/wrf/external/io_grib1 -I/home/aislas/wrf-model/wrf/external/io_int -I/home/aislas/wrf-model/wrf/inc -I/home/aislas/dependencies/netcdf_for_wrf//include \
	-L/home/aislas/wrf-model/wrf/external/io_grib1 -lio_grib1 -L/home/aislas/wrf-model/wrf/external/io_grib_share -lio_grib_share -L/home/aislas/wrf-model/wrf/external/io_int -lwrfio_int -L/home/aislas/wrf-model/wrf/external/io_netcdf -lwrfio_nf -L/home/aislas/dependencies/netcdf_for_wrf//lib  -lnetcdf \
	
/usr/bin/ld: /home/aislas/wrf-model/wrf/external/io_netcdf/libwrfio_nf.a(wrf_io.o): in function `__ext_ncd_support_routines_MOD_netcdf_err.part.0':
wrf_io.f:(.text+0x3c): undefined reference to `nf_strerror_'
...many more nf_* errors...
/usr/bin/ld: field_routines.f:(.text+0x89): undefined reference to `nf_get_vara_real_'
/usr/bin/ld: /home/aislas/wrf-model/wrf/external/io_netcdf/libwrfio_nf.a(field_routines.o): in function `ext_ncd_doublefieldio_':
field_routines.f:(.text+0x1b6): undefined reference to `nf_put_vara_double_'
/usr/bin/ld: field_routines.f:(.text+0x1e9): undefined reference to `nf_get_vara_double_'
/usr/bin/ld: /home/aislas/wrf-model/wrf/external/io_netcdf/libwrfio_nf.a(field_routines.o): in function `ext_ncd_intfieldio_':
field_routines.f:(.text+0x316): undefined reference to `nf_put_vara_int_'
/usr/bin/ld: field_routines.f:(.text+0x349): undefined reference to `nf_get_vara_int_'
/usr/bin/ld: /home/aislas/wrf-model/wrf/external/io_netcdf/libwrfio_nf.a(field_routines.o): in function `ext_ncd_logicalfieldio_':
field_routines.f:(.text+0x7c6): undefined reference to `nf_put_vara_int_'
/usr/bin/ld: field_routines.f:(.text+0x8fb): undefined reference to `nf_get_vara_int_'
collect2: error: ld returned 1 exit status
make[1]: [Makefile:13: geogrid.exe] Error 1 (ignored)
make[1]: Leaving directory '/home/aislas/wrf-model/wps_base/geogrid/src'

With these changes (analogous excerpt):

read_geogrid.c: In function ‘read_geogrid_’:
read_geogrid.c:124:62: warning: left shift count >= width of type [-Wshift-count-overflow]
  124 |             if ((*isigned) && (ival > (1 << 31))) ival -= (1 << 32);
      |                                                              ^~
gfortran   -o geogrid.exe cio.o wrf_debug.o bitarray_module.o constants_module.o module_stringutil.o geogrid.o gridinfo_module.o hash_module.o interp_module.o list_module.o llxy_module.o misc_definitions_module.o module_debug.o module_map_utils.o output_module.o parallel_module.o process_tile_module.o proc_point_module.o queue_module.o read_geogrid.o smooth_module.o source_data_module.o \
	/home/aislas/wrf-model/wrf/frame/module_driver_constants.o \
	/home/aislas/wrf-model/wrf/frame/pack_utils.o /home/aislas/wrf-model/wrf/frame/module_machine.o \
	/home/aislas/wrf-model/wrf/frame/module_internal_header_util.o \
	-I/home/aislas/wrf-model/wrf/external/io_netcdf -I/home/aislas/wrf-model/wrf/external/io_grib_share -I/home/aislas/wrf-model/wrf/external/io_grib1 -I/home/aislas/wrf-model/wrf/external/io_int -I/home/aislas/wrf-model/wrf/inc -I/home/aislas/dependencies/netcdf_for_wrf//include \
	-L/home/aislas/wrf-model/wrf/external/io_grib1 -lio_grib1 -L/home/aislas/wrf-model/wrf/external/io_grib_share -lio_grib_share -L/home/aislas/wrf-model/wrf/external/io_int -lwrfio_int -L/home/aislas/wrf-model/wrf/external/io_netcdf -lwrfio_nf -L/home/aislas/dependencies/netcdf_for_wrf//lib -lnetcdff -lnetcdf \
	
make[1]: Leaving directory '/home/aislas/wrf-model/wps_base/geogrid/src'

This was tested with the following $NETCDF/lib/ contents:

cmake/
libnetcdff.settings
libnetcdff.so -> libnetcdff.so.7*
libnetcdff.so.7 -> libnetcdff.so.7.1.0*
libnetcdff.so.7.1.0*
libnetcdf.settings
libnetcdf.so -> libnetcdf.so.19*
libnetcdf.so.19*
pkgconfig/