[Bug testsuite/104423] [libgomp, testsuite] Add means to do accelerator-only testing in libgomp

[vries at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104423

--- Comment #4 from Tom de Vries <vries at gcc dot gnu.org> ---
Created attachment 52416
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=52416&action=edit
[libgomp, testsuite, nvptx] Add GOMP_NVPTX_JIT_ITER (libgomp.c/c.exp only)