[media] extract_xc3028.pl: fix permissions

This is an executable file. Change permissions to reflect it.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/Documentation/video4linux/extract_xc3028.pl b/Documentation/video4linux/extract_xc3028.pl
old mode 100644
new mode 100755