use Ubuntu 14.04 on Travis CI

Author: rhysd

.travis.yml

@@ -1,4 +1,5 @@
 language: ruby
+dist: trusty
 rvm:
     - 1.9.3
 env:
@@ -15,8 +16,8 @@ script:
 addons:
     apt:
         sources:
-            - llvm-toolchain-precise-5.0
-            - llvm-toolchain-precise-4.0
+            - llvm-toolchain-trusty-5.0
+            - llvm-toolchain-trusty-4.0
             - ubuntu-toolchain-r-test
         packages:
             - g++-4.9

t/clang_format_spec.vim

@@ -8,7 +8,7 @@ function! s:detect_clang_format() abort
         return $CLANG_FORMAT
     endif
 
-    for suffix in ['-HEAD', '-3.8', '-3.7', '-3.6', '-3.5', '-3.4', '']
+    for suffix in ['-HEAD', '-5.0', '-4.0', '-3.8', '-3.7', '-3.6', '-3.5', '-3.4', '']
         let c = 'clang-format' . suffix
         if executable(c)
             return c