message: Stop building on master on Travis.
diff: @@ -10,6 +10,7 @@ matrix:
  include:
  - env: TARGET=x86_64-unknown-linux-gnu
  ALT=i686-unknown-linux-gnu
  + if: branch != master OR type = pull_request
  - env: TARGET=x86_64-apple-darwin
  ALT=i686-apple-darwin
  