Merging r295474:

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r295474 | hahnfeld | 2017-02-17 10:32:58 -0800 (Fri, 17 Feb 2017) | 6 lines

[OpenMP] Fix cancellation point in task with no cancel

With tasks, the cancel may happen in another task. This has a different
region info which means that we can't find it here.

Differential Revision: https://reviews.llvm.org/D30091
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llvm-svn: 296151