check: Use GST_CHECK_MAIN () macro everywhere

Makes source code smaller, and ensures we go through common initialization
path (like the one that sets up XML unit test output ...)

tests/check/elements/amrnbenc.c

@@ -145,19 +145,4 @@ amrnbenc_suite ()
   return s;
 }
 
-int
+GST_CHECK_MAIN (amrnbenc);
-main (int argc, char **argv)
-{
-  int nf;
-
-  Suite *s = amrnbenc_suite ();
-  SRunner *sr = srunner_create (s);
-
-  gst_check_init (&argc, &argv);
-
-  srunner_run_all (sr, CK_NORMAL);
-  nf = srunner_ntests_failed (sr);
-  srunner_free (sr);
-
-  return nf;
-}

tests/check/elements/mpeg2dec.c

@@ -1955,19 +1955,4 @@ mpeg2dec_suite (void)
   return s;
 }
 
-int
+GST_CHECK_MAIN (mpeg2dec);
-main (int argc, char **argv)
-{
-  int nf;
-
-  Suite *s = mpeg2dec_suite ();
-  SRunner *sr = srunner_create (s);
-
-  gst_check_init (&argc, &argv);
-
-  srunner_run_all (sr, CK_NORMAL);
-  nf = srunner_ntests_failed (sr);
-  srunner_free (sr);
-
-  return nf;
-}

tests/check/elements/x264enc.c

@@ -305,19 +305,4 @@ x264enc_suite (void)
   return s;
 }
 
-int
+GST_CHECK_MAIN (x264enc);
-main (int argc, char **argv)
-{
-  int nf;
-
-  Suite *s = x264enc_suite ();
-  SRunner *sr = srunner_create (s);
-
-  gst_check_init (&argc, &argv);
-
-  srunner_run_all (sr, CK_NORMAL);
-  nf = srunner_ntests_failed (sr);
-  srunner_free (sr);
-
-  return nf;
-}

tests/check/elements/xingmux.c

@@ -151,19 +151,4 @@ xingmux_suite (void)
   return s;
 }
 
-int
+GST_CHECK_MAIN (xingmux);
-main (int argc, char **argv)
-{
-  int nf;
-
-  Suite *s = xingmux_suite ();
-  SRunner *sr = srunner_create (s);
-
-  gst_check_init (&argc, &argv);
-
-  srunner_run_all (sr, CK_NORMAL);
-  nf = srunner_ntests_failed (sr);
-  srunner_free (sr);
-
-  return nf;
-}

tests/check/pipelines/lame.c

@@ -124,19 +124,4 @@ lame_suite (void)
   return s;
 }
 
-int
+GST_CHECK_MAIN (lame);
-main (int argc, char **argv)
-{
-  int nf;
-
-  Suite *s = lame_suite ();
-  SRunner *sr = srunner_create (s);
-
-  gst_check_init (&argc, &argv);
-
-  srunner_run_all (sr, CK_NORMAL);
-  nf = srunner_ntests_failed (sr);
-  srunner_free (sr);
-
-  return nf;
-}