Chris sabermod

<remove-project name="CyanogenMod/android_external_libpng" />
	<project name="SaberMod/android-external-libpng.git" path="external/libpng" remote="gitlab" revision="sm-lp1" />
	<project path="prebuilts/gcc/linux-x86/host/x86_64-linux-glibc2.15-4.8" name="platform/prebuilts/gcc/linux-x86/host/x86_64-linux-glibc2.15-4.8" groups="pdk,linux" remote="aosp" revision="master"/>