Merging r315578:

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r315578 | abataev | 2017-10-12 06:51:32 -0700 (Thu, 12 Oct 2017) | 7 lines

[OPENMP] Fix PR34925: Fix getting thread_id lvalue for inlined regions
in C.

If we try to get the lvalue for thread_id variables in inlined regions,
we did not use the correct version of function. Fixed this bug by adding
overrided version of the function getThreadIDVariableLValue for inlined
regions.
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llvm-svn: 318315