[Bug pch/61250] Random pch failures with -save-temps on x86_64-apple-darwin1(3-8).

[iains at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61250

--- Comment #26 from Iain Sandoe <iains at gcc dot gnu.org> ---
so, should be fixed on trunk, so far.