guest_amd64_spechelper: number (in comments) and reorder the spec
cases for arbitrary-condition-after-sub32/sub64.  This makes it easier
to see which cases are missing.  No functional change.



git-svn-id: svn://svn.valgrind.org/vex@2963 8f6e269a-dfd6-0310-a8e1-e2731360e62c