revert and update to ImageMagick-6.8.7-0
quantize bulk reduce acceleration.
configure change for quantize bulk reduce acceleration
* patch for AU mobile phone bug.
 - animation GIF image size to over 2x2.
 - applied 2x2 patch also in bitmap identical case.

same to
 - c9f21c75af0b981bfd40a0cca7d0850a956d429c
 - a6901b4d1687f5089fa7900cb19520f064a74312