Global defines for skia neon optimization

Ported from

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

Change-Id: If9ad5b5db6537554f42faa60080da62a5ce0c4df
Merge remote-tracking branch 'upstream/kk44' into kk44