This will install, for example, a 'ld.gold' symlink in
STAGING_BINDIR_TOOLCHAIN/gcc, which we can then allow gcc to get to.
This makes it possible to rebuild just binutils-cross and use everything
else from an external toolchain, which can be useful to get ahold of
ld.gold when the external toolchain doesn't provide it.
Signed-off-by: Christopher Larson <chris_larson@mentor.com>
