Add binutils-2.40

[nikic]

Used by freebsd-toolchain.sh here: https://github.com/rust-lang/rust/blob/b1b26b834d85e84b46aa8f8f3ce210a1627aa85f/src/ci/docker/scripts/freebsd-toolchain.sh#L31

ftp.gnu.org being down again failed rust-lang/rust#145298 yesterday.

[nikic]

the hash of https://sourceware.org/pub/binutils/releases/binutils-2.40.tar.bz2 doesn't match (expected f8298eb153a4b37d112e945aa5cb2850040bcf26a3ea65b5a715c83afe05e48a, downloaded f8298eb153a4b37d112e945aa5cb285040b0cf26a3ea65b5a715c83afe50e48a)

I'm very confused. I'm using the hash from a local sha256sum. And it seems to nearly match, but one zero has moved to a different place? Wat?

[nikic]

Python agrees with the sha256sum hash.

[nikic]

I think it's broken printing code:

ci-mirrors/src/utils.rs

Line 8 in a6ac9ad

result.push_str(&format!("{byte:0<2x}"));