Merge pull request #698 from ProjectSkyfire/travis

Travis: Update Travis to Clang 3.7

.travis.yml

@@ -25,12 +25,16 @@ compiler:
 before_install:
   - sudo add-apt-repository ppa:kalakris/cmake -y
   - sudo add-apt-repository ppa:ubuntu-toolchain-r/test -y
+  - sudo add-apt-repository 'deb http://llvm.org/apt/precise/ llvm-toolchain-precise-3.7 main'
+  - wget -O - http://llvm.org/apt/llvm-snapshot.gpg.key | sudo apt-key add -
   - sudo apt-get update -qq
+  - sudo apt-get install clang-3.7
   - sudo apt-get install libace-dev
   - sudo apt-get install libncurses5-dev
   - sudo apt-get install build-essential autoconf libtool make cmake git-core patch wget links zip unzip unrar
   - sudo apt-get install openssl libssl-dev mysql-server mysql-client libmysqlclient15-dev libmysql++-dev libreadline6-dev zlib1g-dev libbz2-dev
   - if [ "$CXX" = "clang++" ]; then sudo apt-get install -qq libstdc++-4.8-dev; fi
+  - if [ "$CXX" = "clang++" ]; then export CXX="clang++-3.7" CC="clang-3.7"; fi
   - if [ "$CXX" = "g++" ]; then sudo apt-get install -qq g++-4.8; fi
   - if [ "$CXX" = "g++" ]; then export CXX="g++-4.8" CC="gcc-4.8"; fi