make acltest fails per README on Cygwin

[byronka]

byron@DESKTOP-4GITO6A ~/dev/Ada-Crypto-Library
$ make acltest
gnatmake -P acltest.gpr
acltest.gpr:5:33: "/usr/share/ada/adainclude/aunit/" is not a valid directory
gprbuild: "acltest.gpr" processing failed
make: *** [Makefile:29: acltest] Error 5

[byronka]

Naive fix:

$ git diff
diff --git a/acltest.gpr b/acltest.gpr
index 2b0dee6..3a876e7 100644
--- a/acltest.gpr
+++ b/acltest.gpr
@@ -2,7 +2,7 @@ with "libadacrypt.gpr";

project AclTest is

• for Source_Dirs use ("test/","/usr/share/ada/adainclude/aunit/");

• for Source_Dirs use ("test/","C:\GNAT\2017\include\aunit");
  for Object_Dir use "test";
  for Main use ("test-asymmetric_ciphers.adb","test-big_number.adb",
  "test-hash.adb", "test-kdf.adb", "test-symmetric_ciphers.adb",
  @@ -22,4 +22,4 @@ project AclTest is
  package Linker is
  end Linker;

-end AclTest;
\ No newline at end of file
+end AclTest;