suppress pyre erros in xnnpack/fuse_batch_norm

Summary:
There were multiple pyre errors in fuse_batch_norm operator before this diff.

 This diff added several pyre command to suppress them.

Before:
 {F1128589876}

After:
 {F1128590200}

Reviewed By: digantdesai

Differential Revision: D50563193

fbshipit-source-id: 5843d32e9b8724399c4aaedbacd31b918d8d5748