message: Use Clang 6 for sanitizer checks
diff: FROM ubuntu:16.04
  # Setup the LLVM repository
  -RUN echo deb http://apt.llvm.org/xenial/ llvm-toolchain-xenial-5.0 main > /etc/apt/sources.list.d/clang.list
  +RUN echo deb http://apt.llvm.org/xenial/ llvm-toolchain-xenial-6.0 main > /etc/apt/sources.list.d/clang.list
  # This forces dpkg not to call sync() after package extraction and speeds up install
  RUN echo "force-unsafe-io" > /etc/dpkg/dpkg.cfg.d/02apt-speedup
  @@ -17,7 +17,7 @@ RUN apt-key add /tmp/llvm.key
  # Install clang and everything needed to build core
  RUN apt-get update \
  - && apt-get install -y clang-5.0 \
  + && apt-get install -y clang-6.0 \
  cmake \
  libprocps4-dev \
  libssl-dev \
  @@ -25,5 +25,5 @@ RUN apt-get update \
  && rm -rf /var/lib/apt/lists/*
  # Make clang the default compiler
  -ENV CC /usr/bin/clang-5.0
  -ENV CXX /usr/bin/clang++-5.0
  \ No newline at end of file
  +ENV CC /usr/bin/clang-6.0
  +ENV CXX /usr/bin/clang++-6.0
  \ No newline at end of file
  