am c21ca5b4: Merge "Include <strings.h> for ffs."

* commit 'c21ca5b4272fc225c0f6a6486b249db3c9f780bd':
  Include <strings.h> for ffs.
tree: 6ab98e3be518af5919df1863ff73a72b987a4d4c
  1. keystore/
  2. keystore-engine/
  3. softkeymaster/