Add m4 to the prebuilt build-tools
am: 9867042b2c

Change-Id: I88aeeadb97f5ef84da726b8799225a1b210cc078
tree: 901a054bc08c22702cf48d655e07a184d33aca7d
  1. common/
  2. darwin-x86/
  3. linux-x86/
  4. path/
  5. build-prebuilts.sh
  6. manifest.xml
  7. OWNERS