Mark block test as pass on ARM.
Added CMake support to the CHANGES.
Merge branch 'master' of github.com:pocl/pocl
Disabled the external_linkage test as it's buggy.
The Clang patch was applied upstream. Not expecting a FAIL with
the blocks test anymore with Clang 3.5.
Use clang compilation instead of lli-interpreting bitcode in cmake tests

- this fixes ARM builds for the time being, will have to be fixed
  for cross-compilation