Update PATH for python-gi tests on Windows

Update PATH for python-gi tests on Windows, since updating LD_LIBRARY_PATH
has no effect

test cases/frameworks/11 gir subproject/gir/meson.build

@@ -31,6 +31,9 @@ message('TEST: ' + girsubproject.outdir())
 envdata = environment()
 envdata.append('GI_TYPELIB_PATH', girsubproject.outdir(), 'subprojects/mesongir', separator : ':')
 envdata.append('LD_LIBRARY_PATH', girsubproject.outdir(), 'subprojects/mesongir')
+if ['windows', 'cygwin'].contains(host_machine.system())
+  envdata.append('PATH', girsubproject.outdir(), 'subprojects/mesongir')
+endif
 
 test('gobject introspection/subproject/c', girexe)
 test('gobject introspection/subproject/py', find_program('prog.py'),

test cases/frameworks/7 gnome/gir/meson.build

@@ -41,5 +41,8 @@ gir_paths = ':'.join([girlib.outdir(), dep1lib.outdir(), dep2lib.outdir()])
 envdata = environment()
 envdata.append('GI_TYPELIB_PATH', gir_paths, separator : ':')
 envdata.append('LD_LIBRARY_PATH', gir_paths)
+if ['windows', 'cygwin'].contains(host_machine.system())
+  envdata.append('PATH', gir_paths)
+endif
 test('gobject introspection/py', find_program('prog.py'),
      env : envdata)