v4l2: detect and use the Sundtek driver

(cherry picked from commit 8bf55dd42dd50f4340d52ab4528c150ad1187f93)

modules/access/v4l2/lib.c

@@ -48,7 +48,11 @@ static int fd_open (int fd, int flags)
 
 static void v4l2_lib_load (void)
 {
-    void *h = dlopen ("libv4l2.so.0", RTLD_LAZY | RTLD_LOCAL);
+    void *h;
+
+    h = dlopen ("libmediaclient.so", RTLD_LAZY | RTLD_LOCAL | RTLD_NOLOAD);
+    if (h == NULL)
+        h = dlopen ("libv4l2.so.0", RTLD_LAZY | RTLD_LOCAL);
     if (h == NULL)
         goto fallback;