openh264: fix recipe for text relocation issues on Android >= 5.0 x86 builds
openh264: fix recipe for text relocation issues on Android >= 5.0 x86 builds

Adding `ENFORCEPIC=Yes` to the recipe fixes the openh264 build to avoid
text relocations on Android >= 5.0 x86. The fix works on openh264 since
version 1.7.0.

Fixes #8

nirbheek/cerbero,GStreamer/cerbero,GStreamer/cerbero,nirbheek/cerbero,GStreamer/cerbero,nirbheek/cerbero,GStreamer/cerbero,GStreamer/cerbero,nirbheek/cerbero