x86: set -msse2 for all builds
x86: set -msse2 for all builds

All supported x86 processors have SSE2.

Change-Id: Ib4a0511c456fe3185b0b902390860ad557aeedcf

xorware/android_build,xorware/android_build,xorware/android_build,xorware/android_build,xorware/android_build