Travis uses new CMake and is dropping sudo=false

Author: henryiii

.travis.yml

@@ -1,6 +1,6 @@
 language: cpp
 dist: trusty
-sudo: false
+sudo: true
 matrix:
   include:
   # This config does a few things:
@@ -173,10 +173,7 @@ install:
         git clone https://github.com/llvm-mirror/libcxx.git llvm-source/projects/libcxx -b release_50
         git clone https://github.com/llvm-mirror/libcxxabi.git llvm-source/projects/libcxxabi -b release_50
         mkdir llvm-build && cd llvm-build
-        # Building llvm requires a newer cmake than is provided by the trusty container:
-        CMAKE_VER=cmake-3.8.0-Linux-x86_64
-        curl https://cmake.org/files/v3.8/$CMAKE_VER.tar.gz | tar xz
-        ./$CMAKE_VER/bin/cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=~/.local ../llvm-source
+        cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=~/.local ../llvm-source
         make -j2 install-cxxabi install-cxx
         cp -a include/c++/v1/*cxxabi*.h ~/.local/include/c++/v1
         cd ..