[Bug jit/63969] gccjit segfaults when it can't locate the correct gcc driver program

[dmalcolm at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63969

--- Comment #6 from dmalcolm at gcc dot gnu.org ---
(In reply to dmalcolm from comment #4)
> Patch posted for review as
> https://gcc.gnu.org/ml/gcc-patches/2014-11/msg02617.html

TMM confirmed on IRC that the proposed patch fixes the issue for them.