Make Mac build generate both 32-bit and 64-bit code.
Make Mac build generate both 32-bit and 64-bit code.

BUG=http://code.google.com/p/skia/issues/detail?id=524
Review URL: https://codereview.appspot.com/6022057

git-svn-id: e8541e15acce502a64c929015570ad1648e548cd@3687 2bbb7eff-a529-9590-31e7-b0007b416f81

Cue/skia,mrobinson/skia,metajack/skia,metajack/skia,mrobinson/skia,metajack/skia,Cue/skia,mrobinson/skia,mrobinson/skia,mrobinson/skia,Cue/skia,Cue/skia,metajack/skia