Fix xnnpack link errors (#101630)
Summary: Setting srcs for all arvr platforms in xnnpack.buck.bzl allows build with arvr/platform010 to pass.
Test Plan: CI
Reviewed By: blchxfm
Differential Revision: D45738660
Pull Request resolved: https://github.com/pytorch/pytorch/pull/101630
Approved by: https://github.com/digantdesai
