intel/compiler: Add variable to dump binaries of all compiled shaders

This can be useful for testing i965_disasm and i965_asm by comparing
bin -> asm -> bin results.

Signed-off-by: Sviatoslav Peleshko <sviatoslav.peleshko@globallogic.com>
Reviewed-by: Sagar Ghuge <sagar.ghuge@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/25657>
5 files changed