Add system/extras/verity/build_verity_metadata.py  to otatools
am: d26a99c3c6

* commit 'd26a99c3c6903c02c5435ec5f0123f057527b0a9':
  Add system/extras/verity/build_verity_metadata.py  to otatools

Change-Id: I94f04639338cdb961f3c378b12b8778c89fed232