Revert "Auto merge of #46360 - kennytm:workaround-travis-8821, r=kennytm"

This reverts commit dc0e227745765c198958f0298785d18bcf61d4ae, reversing
changes made to 77ab3a1d5ff69c0cb3eb85a75ef734eaf7429f1b.

[skip ci]

.travis.yml

@@ -25,8 +25,6 @@ matrix:
     - env: IMAGE=dist-x86_64-linux DEPLOY_ALT=1
       if: branch = try OR branch = auto
 
-    # FIXME: The macOS dist images are temporarily disabled until Travis bug is fixed
-    # https://github.com/travis-ci/travis-ci/issues/8821
     - env: >
         RUST_CHECK_TARGET=dist
         RUST_CONFIGURE_ARGS="--enable-extended --enable-profiler"
@@ -39,7 +37,7 @@ matrix:
         NO_DEBUG_ASSERTIONS=1
       os: osx
       osx_image: xcode7.3
-      if: branch = disabled
+      if: branch = auto
 
     # macOS builders. These are placed near the beginning because they are very
     # slow to run.
@@ -94,7 +92,7 @@ matrix:
         NO_DEBUG_ASSERTIONS=1
       os: osx
       osx_image: xcode7.3
-      if: branch = disabled
+      if: branch = auto
 
     - env: >
         RUST_CHECK_TARGET=dist
@@ -108,7 +106,7 @@ matrix:
         NO_DEBUG_ASSERTIONS=1
       os: osx
       osx_image: xcode7.3
-      if: branch = disabled
+      if: branch = auto
 
     # Linux builders, remaining docker images
     - env: IMAGE=arm-android