[Bug target/63773] [meta-bug] Restoring darwin bootstrap for gcc 5.0

[howarth at bromo dot med.uc.edu]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63773

--- Comment #12 from howarth at bromo dot med.uc.edu ---
With the commits of https://gcc.gnu.org/ml/gcc-cvs/2014-11/msg00357.html and
https://gcc.gnu.org/ml/gcc-cvs/2014-11/msg00370.html, the darwin bootstrap
should be fully restored on darwin13 and earlier. 

The patch to fix the configure scripts, generated from the broken libtool.m4,
remains to be applied to fix the darwin14 bootstrap.