[Bug bootstrap/85658] gcc-8.0.1 stopped validating --with-arch= flag

[slyfox at inbox dot ru]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85658

--- Comment #2 from Sergei Trofimovich <slyfox at inbox dot ru> ---
Created attachment 44074
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44074&action=edit
93_all_arm-arch.patch