Fix build on arm64
On arm64 we only generate cross-compilers for amd64 and arm{hf,el}
architectures, not for i386. Therefore we shouldn't build-depend on
binutils-i686-linux-gnu
for the arm64 builds.
On arm64 we only generate cross-compilers for amd64 and arm{hf,el}
architectures, not for i386. Therefore we shouldn't build-depend on
binutils-i686-linux-gnu
for the arm64 builds.