This should help with #4939. `--with-PROG` flags should be applied to every
package.  If we change hsc2hs via `--with-hsc2hs=` or any other program and
similarly `--hsc2hs-options` should also be provided to that program.  Same
holds for `--PROG-options`.  Because we do no inherit the properties from
AllPackages for LocalPackages, we need to have the set of programs and options
in both.