testsuite/registry/: A little program that looks through the registry to find elements of a given type.  Not particul...

Original commit message from CVS:
* testsuite/registry/Makefile.am:
* testsuite/registry/gst-print-formats.c:
(print_pad_templates_info), (print_element_list),
(print_typefind_list), (list_sort_func), (get_typefind_mime_list),
(g_list_uniqify), (get_pad_templates_info),
(get_element_mime_list), (print_mime_list), (main): A little
program that looks through the registry to find elements of
a given type.  Not particularly interesting as a test, except
that there's no other test covering the same area.