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

[redi at gcc dot gnu.org]

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

--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Alex Kruppa from comment #4)
> Problem still exists in 10.2.0:

And everybody still just removes the build dir instead of using 'make clean'.