restore 'if: branch = auto' for cross2 builder

Author: bgermann

.travis.yml

@@ -116,6 +116,7 @@ matrix:
     - env: IMAGE=cross DEPLOY=1
       if: branch = auto
     - env: IMAGE=cross2 DEPLOY=1
+      if: branch = auto
     - env: IMAGE=dist-aarch64-linux DEPLOY=1
       if: branch = auto
     - env: IMAGE=dist-android DEPLOY=1