new devel/llvm-openmp

Hi,

I need OpenMP for some other port I am working on. It is an extension
for gcc or clang. Currently I only need it for base clang, so I
build it from llvm 16.0.6 sources.

Comment:
LLVM OpenMP libraries

Description:
The OpenMP API supports multi-platform shared-memory parallel
programming in C/C++ and Fortran. The OpenMP API defines a portable,
scalable model with a simple and flexible interface for developing
parallel applications on platforms from the desktop to the
supercomputer.

ok to import?

bluhm