[OMPT] Add annotations to testcases that are expected to fail when using certain compilers

Reasons for expected failures are mainly bugs when using lables in OpenMP regions
or missing support of some OpenMP features.
For some worksharing clauses, support to distinguish the kind of workshare was
added just recently.

If an issue was fixed in a minor release version of a compiler, we flag the
test as unsupported for this compiler version to avoid false positives.
Same for fixes that where backported to older compiler versions.

Differential Revision: https://reviews.llvm.org/D40384

llvm-svn: 321262