Reduce embolden effect. DO NOT MERGE

Cherry-pick of Iec1c478171e33751be1cddbaae6a8ec30bb6cbab

Certain CJK glyphs become essentially unreadable when emboldened at
sizes used by common apps like News/Weather. Reducing embolden
strength slightly makes these glyphs much more readable without
sacrificing bold/normal weight differentiation.

Bug: 6712857
Change-Id: I1025f72b5ed07f0a65924ba58aa19511bc417eb1
merge in jb-mr0-release history after reset to jb-dev
skia: Several tunings

* SkPaint constructor & copy constructor
  Set up a global SkTextLocale array to maintain all TextLocale
  explicit small copy for struture.

* SkDraw constructor
  explicit small NULL set for structure

* quickReject
  Go back to explicit exponent check way instead of times zero way

Change-Id: I9b2dd08b104f32bd7b6248400189504fe25cd9f9

Conflicts:

	Android.mk
Merge branch 'jb-mr0-release' of https://android.googlesource.com/platform/external/skia into aosp-merge
Merge remote-tracking branch 'origin/jellybean' into jb