Disable Int8Transpose test
Summary: It's failing in the FB internal build because we don't enable that op.
Test Plan: buck test //xplat/caffe2:caffe2_testAndroid
Reviewed By: supriyar
Differential Revision: D17139694
fbshipit-source-id: 8091b71ff826466f3e2e1b4d6f87b9b50d1def20
