[Bug driver/61651] Cross compiler will use host as eroneously

[martin at netbsd dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61651

--- Comment #1 from Martin Husemann <martin at netbsd dot org> ---
Passing AS_FOR_TARGET (and friends) in the configure environment does not help,
but explicitly adding --with-as=.. does fix the issue.

So this looks like a pure configure bug.