Fix Paint == comparison on Android.

The == operator was incorrect because of Androids use of
fGenerationID. This change moves the ID to the end of the
paint struct and omits it from the == comparison.
Review URL: http://codereview.appspot.com/5437098

git-svn-id: http://skia.googlecode.com/svn/trunk@2780 2bbb7eff-a529-9590-31e7-b0007b416f81
3 files changed