[Openmp-dev] Removing extra files copy

[C Bergström]

Exact error (which varies depending on which target causes the race)

Error copying file
"/root/bamboo-agent-home/xml-data/build-dir/DEBUG/build/openmp-llvm/build-x86_32/iomp_lib.h"
to "/root/bamboo-agent-home/xml-data/build-dir/DEBUG/src/openmp-llvm/runtime/exports/lin_32e.deb/include_compat/iomp_lib.h".

To try to explain again - If you are building openmp from a parent
cmake and that cmake is looping over multiple targets you hit the
problem above. (multiple times that file being copied to the same
place)

That file isn't used during the build process at all and I don't know
why it's being copied during the build. Like I mentioned - this should
be removed or moved to an install target.