Merge commit '52e7d3d91ab6a5bab77c5dfb1ed47381fd52f9ba' into mm

Conflicts:
	libc/Android.mk
	libc/arch-arm/include/machine/cpu-features.h
	libc/bionic/pthread.c
	libc/bionic/semaphore.c

Change-Id: I599b069b71e381f8beb6c06acfde86b15e049273