cc/gcc: fix the PR58595 patch

It applies manually with fuzz 2, but ct-ng does not accept any fuxx at all.

So, re-diff the patch so it applies cleanly.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>

 # Compute s390-specific values

 CT_DoArchTupleValues() {

     # That's the only thing to override

     if [ "${CT_ARCH_64}" = "y" ]; then

         CT_TARGET_ARCH="s390x${CT_ARCH_SUFFIX}"

     fi

 }