* [x264] borrow some code from ffmpeg portfile to fix compilation for uwp * [x264] Fix uwp configure instead of removing -RTC1
* Add doxygen to acquired programs * Add packages option to msys function * Add documentation for PACKAGES in vcpkg_require_msys * [ffmpeg][x264] Update to use `PACKAGES` parameter. Tweak docs.
* add x264 package add x264 package * [x264] Simplify portfile. Use GitHub mirror instead of trying to run git clone.