Enable travis-ci container environment.

.travis.yml

@@ -1,21 +1,24 @@
+addons:
+  apt:
+    packages:
+    - clang-3.5
+    - lib32stdc++6
+    - lib32z1-dev
+    - libc6-dev-i386
+    sources:
+    - llvm-toolchain-precise-3.5
+    - ubuntu-toolchain-r-test
+  cache:
+    directories:
+    - ../mysql-5.0
 language: cpp
+sudo: false
 compiler:
   - clang
 before_script:
-  - sudo apt-get update -qq
-  - sudo apt-get install -y python-software-properties
-  - sudo add-apt-repository --yes ppa:ubuntu-toolchain-r/ppa
-  - sudo add-apt-repository ppa:ubuntu-toolchain-r/test -y
-  - sudo apt-get update -qq
-  - sudo apt-get install -qq g++-4.8
-  - sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-4.8 90
-  - echo "deb http://llvm.org/apt/precise/ llvm-toolchain-precise-3.5 main" | sudo tee --append /etc/apt/sources.list
-  - echo "deb-src http://llvm.org/apt/precise/ llvm-toolchain-precise-3.5 main" | sudo tee --append /etc/apt/sources.list
-  - wget -O - http://llvm.org/apt/llvm-snapshot.gpg.key | sudo apt-key add -
-  - sudo apt-get update -qq
-  - sudo apt-get install -y g++-multilib libc6-dev-i386 lib32stdc++6 lib32z1-dev clang-3.5
   - CHECKOUT_DIR=$PWD && cd .. && $CHECKOUT_DIR/tools/checkout-deps.sh && cd $CHECKOUT_DIR
 script:
   - mkdir build && cd build
+  - PATH="~/.local/bin:$PATH"
   - CC=clang-3.5 CXX=clang-3.5 python ../configure.py --enable-optimize --sdks=episode1,tf2,l4d2,csgo,dota
   - ambuild