Removed msvs_system_libraries syntax, in preference to using -l for includes assumed to be in the library path.
Removed msvs_system_libraries syntax, in preference to using -l for includes assumed to be in the library path.

Review URL: http://codereview.chromium.org/28348
old8xp/gyp_from_google,old8xp/gyp_from_google,old8xp/gyp_from_google,old8xp/gyp_from_google,old8xp/gyp_from_google