Update LLVM on Travis

Should fix the issue with Travis (No available formula with the name "llvm36"). 
We're using 3.8 so there's no reason for Travis to use 3.6.

.travis.yml

@@ -42,14 +42,14 @@ before_install:
       sudo pip install cpp-coveralls requests[security];
     else
       brew update; brew update;
-      brew install glew wxwidgets llvm36;
+      brew install glew wxwidgets llvm38;
     fi;
 
 before_script:
  - git submodule update --init rsx_program_decompiler asmjit 3rdparty/ffmpeg 3rdparty/pugixml 3rdparty/GSL 3rdparty/libpng Utilities/yaml-cpp 3rdparty/cereal
  - mkdir build
  - cd build
- - if [ "$TRAVIS_OS_NAME" = "linux" ]; then cmake ..; else cmake .. -DLLVM_DIR=/usr/local/opt/llvm36/lib/llvm-3.6/share/llvm/cmake; fi
+ - if [ "$TRAVIS_OS_NAME" = "linux" ]; then cmake ..; else cmake .. -DLLVM_DIR=/usr/local/opt/llvm38/lib/llvm-3.8/share/llvm/cmake; fi
 
 script:
 # Add a command to show all the variables. May be useful for debugging Travis.
@@ -62,15 +62,15 @@ addons:
   apt:
     sources:
     - ubuntu-toolchain-r-test
-#    - llvm-toolchain-trusty-3.6 temporarily disabled
+#    - llvm-toolchain-trusty-3.8 temporarily disabled
     packages:
     - cmake
     - libopenal-dev
     - freeglut3-dev
     - libglew-dev
     - libc6-dev
-#    - llvm-3.6
-#    - llvm-3.6-dev
+#    - llvm-3.8
+#    - llvm-3.8-dev
     - libedit-dev
     - g++-5
     - gcc-5