[OMPT] First chunk of final OMPT 5.0 interface updates

This patch updates the implementation of the ompt_frame_t, ompt_wait_id_t
and ompt_state_t. The final version of the OpenMP 5.0 spec added the "t"
for these types.
Furthermore the structure for ompt_frame_t changed and allows to specify
that the reenter frame belongs to the runtime.

Patch partially prepared by Simon Convent

Reviewers: hbae

git-svn-id: https://llvm.org/svn/llvm-project/openmp/trunk@349458 91177308-0d34-0410-b5e6-96231b3b80d8