[OPENMP] Add support for cancel constructs in [teams] distribute
parallel for directives.

Added codegen/sema support for cancel constructs in [teams] distribute
parallel for directives.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@318872 91177308-0d34-0410-b5e6-96231b3b80d8
10 files changed