fix binutils-2.44 sha1 format

[angt]

Currently, building from master fails due to a bad SHA1 format in the checksum file, using shasum -a 1 -c:

cd sources/linux-headers-4.19.88-2.tar.xz.tmp && shasum -a 1 -c /home/angt/.tmp/musl-cross-make/hashes/linux-headers-4.19.88-2.tar.xz.sha1
shasum: /home/angt/.tmp/musl-cross-make/hashes/binutils-2.44.tar.gz.sha1: no properly formatted SHA checksum lines found
make: *** [Makefile:90: sources/binutils-2.44.tar.gz] Error 1