Don't concatenate pythonpath and str
Fix test program path for Windows Ninja Multi-Config
Use environment variable to pass cl_cvdunpack_test location to test
Use ENABLE_EXAMPLES instead of ENABLE_TESTS to gate ex_cl_cvdunpack
Directly use the target's path on Windows
Also change the program finding for ex_scan_callbacks_test
Fix python paths handling
Fix the order of some expected results which were incorrect and for
some reason only failed when tested on Windows.
This final fix in this commit provided by Val Snyder.