Fix ndk-build using windows/clang3.1 with -no-canonical-prefixes

With "-no-canonical-prefixes", clang not only doesn't resolve
argv[0] to real path (which we like in favor of distribute
build system), but also forget to add .exe for windows (which
is bad).  Explicit adding .exe to fix it.

Change-Id: I18ff317b80d55eb3a6630391d916b1097b7a3e9b
3 files changed