libs.mk,msvc: add missing vp9rc project

+ fix some test_rc_interface issues:
add a space before $^ in the vcproj rule to add sources to the target,
one between the -I's, and make the guid unique; fixes build / link
errors.

Change-Id: Ia9c99f6a4482a001d993affbc3b3903c2a4e366a
1 file changed