Disable expected test failures.

Reference: https://github.com/pytorch/pytorch/issues/13746
Reference: https://github.com/pytorch/pytorch/issues/21873

Index: pytorch-1.4.0_p0/caffe2/share/contrib/depthwise/CMakeLists.txt
===================================================================
--- pytorch-1.4.0_p0.orig/caffe2/share/contrib/depthwise/CMakeLists.txt
+++ pytorch-1.4.0_p0/caffe2/share/contrib/depthwise/CMakeLists.txt
@@ -6,4 +6,3 @@ set(Caffe2_CONTRIB_DEPTHWISE3x3_TEST_CPU
 )
 
 set(Caffe2_CPU_SRCS ${Caffe2_CPU_SRCS} ${Caffe2_CONTRIB_DEPTHWISE3x3_CPU_SRC} PARENT_SCOPE)
-set(Caffe2_CPU_TEST_SRCS ${Caffe2_CPU_TEST_SRCS} ${Caffe2_CONTRIB_DEPTHWISE3x3_TEST_CPU_SRC} PARENT_SCOPE)