Global defines for skia neon optimization

Ported from

https://github.com/TeamEOS/build/commit/59eb6b9f90c6d239f6c1ed6ca9451d5d75d75657

Change-Id: If9ad5b5db6537554f42faa60080da62a5ce0c4df
Added hgrep for only headers, and kgrep for Kconfig an defconfig files in kernel.

Change-Id: If69a30f668c33df9cd58bb0d7cfd619dfb12a316
Allow msm-3.4 conditional to apply to msm-3.5 1/2