[OPENMP]Dow not emit warnings for uninitialized loop counters.

In OpenMP constructs all counters are initialized and we should not emit
warnings about uninitialized privatized loop control variables.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@375167 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed