[Bug target/91602] GCC fails to build for riscv in a combined tree due to misconfigured leb128 support

[wilson at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91602

--- Comment #14 from Jim Wilson <wilson at gcc dot gnu.org> ---
I posted a patch but didn't get a review, and then got distracted by other
stuff and failed to follow up.
https://gcc.gnu.org/pipermail/gcc-patches/2020-January/539461.html