HEADS UP: clang/llvm/lldb/compiler-rt 3.8.0 imported

Hi,

I imported the (tentative) 3.8.0 release of clang, llvm, lldb and
compiler-rt into head, in r296417.  The upstream release is going to be
very soon now, but I do not expect any changes anymore.

This was tested with make universe, and a few exp-runs, but there is
always a chance that you might run into something unexpected, either
with the base system or ports.  In such cases, please file bugs, and
make sure you note somewhere in the description that it is related to
this import.

Last but not least, thanks to Ed Maste, Roman Divacky, Davide Italiano
and Antoine Brodin for their help with the import.

-Dimitry