[Bug libgcc/67792] GCC 5.2 - make clean fails in libgcc

[sch...@linux-m68k.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67792

--- Comment #1 from Andreas Schwab <sch...@linux-m68k.org> ---
Nobody is testing make clean, patches welcome.  It's much easier to just remove
the build directory before starting over.