Add -Wunused to keystore

Some build targets use clang which has this on with -Wall and -Wextra so
to be consistent with warnings enable it for all targets.

Change-Id: I63c46d9c516f6c2ce27a7c33c5677b0ee3c22eca
1 file changed
tree: 05453a3c767bb460ee1331b65ebf80d2038bdc34
  1. keystore/
  2. keystore-engine/
  3. softkeymaster/