WIP: enable try-buld on macOS.

Author: kennytm

.travis.yml

@@ -16,13 +16,13 @@ matrix:
       if: type = pull_request OR branch = auto
 
     - env: IMAGE=dist-x86_64-linux DEPLOY=1
-      if: branch = try OR branch = auto
+      if: branch = auto
 
     # "alternate" deployments, these are "nightlies" but have LLVM assertions
     # turned on, they're deployed to a different location primarily for
     # additional testing.
     - env: IMAGE=dist-x86_64-linux DEPLOY_ALT=1 CI_JOB_NAME=dist-x86_64-linux-alt
-      if: branch = try OR branch = auto
+      if: branch = auto
 
     - env: >
         RUST_CHECK_TARGET=dist
@@ -105,7 +105,7 @@ matrix:
         CI_JOB_NAME=dist-x86_64-apple
       os: osx
       osx_image: xcode9.3-moar
-      if: branch = auto
+      if: branch = try OR branch = auto
 
     # Linux builders, remaining docker images
     - env: IMAGE=arm-android