Add proper credits and fix merge of JustArchi's optimizations

Change-Id: I2a0e8b5227e663981c7f831fb81f05abde55c0b6
Add -mfpu=neon-fp16 to unknown Clang flags.
Add (some) support for TARGET_FPU_VARIANT.

Conflicts:
	core/combo/arch/arm/armv7-a-neon.mk

Change-Id: Icc270a7e0fcc592d01b596feda8f7c6f9b3577e2
Re-add ARCH_ARM_HAVE_TLS_REGISTER for armv7

OpenGL needs this flag for armv7

For more information :
https://github.com/androidarmv6/android_bionic/commit/7bc88df02f887229738b08fd7f7bd2668805f306
https://github.com/androidarmv6/android_frameworks_native/commit/4ffa795a3e9f2d2a26766147b1cfedbe78e823d4

Change-Id: Ib68c17e2f8dd3c8c15f8f3ea235fe25a46d05b6a
More build fixes

Change-Id: Ib171aaa3039f9f020fdc8b95b54f5f3750088fec