[Bug bootstrap/82610] [8 Regression] Bootstrap fails on macOS 10.13 and FreeBSD 11.1 because of abort redefinition

[dmalcolm at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82610

--- Comment #5 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
I posted fxcoudert's patch from comment 0 for review here:
  https://gcc.gnu.org/ml/gcc-patches/2017-10/msg01478.html