am 2e93a2c4: Merge changes Idfd1a114,If725a1cb,I61211165,If9a05ccb

* commit '2e93a2c438c1415ca9e4c81d9863660c6b3f0daa':
  adb: turn on -Werror
  netcfg: turn on -Werror
  mkbootimg: turn on -Werror
  gpttool: turn on -Werror