Add Linux support

[Isaac-Leonard]

I only have a Mac and have not implemented cross platform support yet.
Doing so should be relatively easy, all of the related code is located at the bottom of the compile.rs file.
All that needs to be done is detecting the current OS and giving LLVM the correct parameters for the detected operating system.
If anyone using linux would like to implement this it would be well appreciated

[CMurtagh-LGTM]

❯ clang -v example-compile.o
clang version 14.0.6
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/bin
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-pc-linux-gnu/11.3.0
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-pc-linux-gnu/12.1.0
Found candidate GCC installation: /usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/11.3.0
Found candidate GCC installation: /usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/12.1.0
Selected GCC installation: /usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/12.1.0
Candidate multilib: .;@m64
Candidate multilib: 32;@m32
Selected multilib: .;@m64
 "/usr/bin/ld" -pie --eh-frame-hdr -m elf_x86_64 -dynamic-linker /lib64/ld-linux-x86-64.so.2 -o a.out /usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/12.1.0/../../../../lib64/Scrt1.o /usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/12.1.0/../../../../lib64/crti.o /usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/12.1.0/crtbeginS.o -L/usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/12.1.0 -L/usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/12.1.0/../../../../lib64 -L/lib/../lib64 -L/usr/lib/../lib64 -L/lib -L/usr/lib example-compile.o -lgcc --as-needed -lgcc_s --no-as-needed -lc -lgcc --as-needed -lgcc_s --no-as-needed /usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/12.1.0/crtendS.o /usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/12.1.0/../../../../lib64/crtn.o
/usr/bin/ld: example-compile.o: relocation R_X86_64_32 against `.rodata.str1.1' can not be used when making a PIE object; recompile with -fPIE
/usr/bin/ld: failed to set dynamic section sizes: bad value
clang-14: error: linker command failed with exit code 1 (use -v to see invocation)