[clang] [openmp] [OpenMP] Fix runtime problem due to wrong map size. (PR #74692)

[Jan Patrick Lehr via cfe-commits]

jplehr wrote:

The issue comes from the bot building without setting CMake option `-DLIBOMPTARGET_ENABLE_DEBUG=ON`. This makes the environment variable `LIBOMPTARGET_DEBUG=1` have no effect in the test, i.e., no output for FileCheck to test.

https://github.com/llvm/llvm-project/pull/74692