Loop optimization for utfString Util [WIP]

Using preload trick for faster hash or len util.

Change-Id: I2703f9b6ec433b4c1b59f723a36c9b4361978c1d
Loop optimization for hash [WIP]

Fix pointer aliasing problems in hash implemetation.

Change-Id: I2c1b87b8340fa6390221ab87c0633b5c3c0ec86d
Remove unused compiler templates for armv7-a*

Change-Id: I68e344c2f2689347d6eeb943030b7263a55cd0bd