Use the new SuperH fixes in the two multilib samples

- Glibc configure args and tuple need adjustment on SuperH
- Only allow "both endian" and "with CPU" for unspecified arch
  variant. May reconsider endianness (was breaking things before
  adjusting glibc tuple)
- Retire non-multilib sample, it should be a subset of the
  multilib one now.

Signed-off-by: Alexey Neyman <stilor@att.net>

scripts/build/libc/glibc.sh

@@ -211,6 +211,7 @@ do_libc_backend_once() {
                 ;;
         esac
     done
+    CT_DoArchGlibcAdjustConfigure extra_config "${glibc_cflags}"
 
     # ./configure is mislead by our tools override wrapper for bash
     # so just tell it where the real bash is _on_the_target_!