[Bug go/70850] Bootstrap fails building libgo: gccgo: error: ../x86_64-pc-linux-gnu/libgo/zstdpkglist.go: No such file or directory

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70850

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Do not configure in srcdir.