We've accumulated a scary amount of local patches to this directory. I
tried to merge them all, but if your favorite change is missing please
reapply it manually (and send it upstream).
This required re-working the streaming support and lit's support for
'--gtest_list_tests' but otherwise seems to be a clean upgrade.
Differential Revision: https://reviews.llvm.org/D28154
llvm-svn: 291029
Benjamin Kramer