Add a missing call to MDNode::deleteTemporary().
Follow-up to r259975. Kudos to the ASAN bots!

<rdar://problem/24493203>

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@260002 91177308-0d34-0410-b5e6-96231b3b80d8
(cherry picked from commit 4404328870f6e3758e5d4d357442b39298f4e8f7)
1 file changed