Revert r188369 (and r188455) which breaks the build on at least some
Linux systems. I've replied on the original commit thread with details
of the problem.

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@188628 91177308-0d34-0410-b5e6-96231b3b80d8
It appears that glibc 2.13 has the same thread descriptor size as 2.11,
bump up the inflection point to 2.14. If someone can tell me how to
actually figure out value for this, that would be awesome.

Anyways, this takes me to one ASan failure, one LSan failure, and three
TSan failures for 'check-all' on Linux.

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@188635 91177308-0d34-0410-b5e6-96231b3b80d8