message: Adds an xl-based compiler set for blue_os.
diff: @@ -103,6 +103,11 @@ compilers:
  cxx: /usr/tce/packages/clang/clang-coral-2017.11.27/bin/clang++
  f77: /usr/tce/packages/clang/clang-coral-2017.11.27/bin/xlflang
  fc: /usr/tce/packages/clang/clang-coral-2017.11.27/bin/xlflang
  + xl@coral:
  + cc: /usr/tce/packages/xl/xl-beta-2017.10.13/bin/xlc
  + cxx: /usr/tce/packages/xl/xl-beta-2017.10.13/bin/xlC
  + f77: /usr/tce/packages/xl/xl-beta-2017.10.13/bin/xlf
  + fc: /usr/tce/packages/xl/xl-beta-2017.10.13/bin/xlf2003
  gcc@4.9.3:
  cc: /usr/tcetmp/packages/gcc/gcc-4.9.3/bin/gcc
  cxx: /usr/tcetmp/packages/gcc/gcc-4.9.3/bin/g++
  