Merge pull request #1773 from juj/fix_test_lua

Fix test_lua on Windows.
Merge pull request #1772 from juj/fix_test_asm_pgo_windows

Fix test_asm_pgo on Windows.
support inline asm comments; fixes #1766
Fix Makefile in test_lua in the case when make is in a path that contains spaces (e.g. c:\program files\emscripten\...\mingw32-make).