Disable 3.9 travis build again :(

Author: TheDan64

.travis.yml

@@ -71,20 +71,20 @@ matrix:
       rust: 1.39.0
       dist: trusty
     # 3.9 seems to have a linking issue :/
-    - env:
-        - LLVM_VERSION="3.9"
-      <<: *BASE
-      addons:
-        apt:
-          sources:
-            - *BASE_SOURCES
-            - sourceline: 'deb https://apt.llvm.org/xenial/ llvm-toolchain-xenial-3.9 main'
-              key_url: 'https://apt.llvm.org/llvm-snapshot.gpg.key'
-          packages:
-            - *BASE_PACKAGES
-            - llvm-3.9-dev
-      rust: 1.39.0
-      dist: xenial
+    # - env:
+    #     - LLVM_VERSION="3.9"
+    #   <<: *BASE
+    #   addons:
+    #     apt:
+    #       sources:
+    #         - *BASE_SOURCES
+    #         - sourceline: 'deb https://apt.llvm.org/xenial/ llvm-toolchain-xenial-3.9 main'
+    #           key_url: 'https://apt.llvm.org/llvm-snapshot.gpg.key'
+    #       packages:
+    #         - *BASE_PACKAGES
+    #         - llvm-3.9-dev
+    #   rust: 1.39.0
+    #   dist: xenial
     - env:
         - LLVM_VERSION="4.0"
       <<: *BASE