Reintroduce MIPS_DEBUGGING_INFO as SGUG_DEBUGGING_INFO.#8

danielhams wants to merge 2 commits intosgidevnet:gcc-8_2_0-irixsgidevnet/gcc:gcc-8_2_0-irixfrom

danielhams:gcc-8_2_0-irix-sgugdidanielhams/gcc:gcc-8_2_0-irix-sgugdiCopy head branch name to clipboard