Deleted 3 flaky GM baselines

gm/base-android-nexus-s/giantbitmap_mirror_bilerp_rotate_gpu.png
gm/base-android-nexus-s/giantbitmap_repeat_bilerp_rotate_gpu.png
gm/base-macmini-lion-float/drawbitmaprect_msaa16.png



git-svn-id: http://skia.googlecode.com/svn/trunk@5154 2bbb7eff-a529-9590-31e7-b0007b416f81