build core/jni with fstrict-aliasing

PS2: Make our own SkRect so skia doesn't need to know what an android::Rect is

Credit to David96 for the inspiration for the fix

Signed-off-by: nuclearmistake <nuclearmistake@gmail.com>
Change-Id: I3233728d8a0a44d085f20729b3c24f197d75741e

Conflicts:
	core/jni/Android.mk