[OpenMP] Add missing RUN lines for OpenMP 4.5

Summary: This was missed when default version was upgraded to 5.0 (part of D81098)

Reviewers: saiislam, ABataev, jdoerfert

Reviewed By: saiislam

Subscribers: yaxunl, guansong, sstefan1, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D84221