Merging r298705:

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r298705 | tstellar | 2017-03-24 12:13:18 -0400 (Fri, 24 Mar 2017) | 11 lines

stable-merge-request.sh: Add a script for submitting merge requests via bugzilla

Summary:
This script will automatically create a new stable merge request bug in
bugzilla for the given svn revision and release number.

Reviewers: hans

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D30905
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llvm-svn: 299455