Log Message:
g95: now that I understand why -mips1 is chosen here, clarify it in the
comment for the patch.

note: the choice of o32 for this package is questionable, and defaulting
to n32 on gcc/config.gcc instead is probably the right thing, this package
won't run on platforms that use o32, and the n32 linker can't handle the
o32 objects apparently - it dies with "not enough GOT space for local GOT
entries" (PR toolchain/51521).

defaulting to n32 will allow deleting this patch, but I won't make the
transition because I can't get further in the build and hit a compile
assertion about MTYPE not matching CEXT (double float in my case), similar
to GCC bug #20633.