gst: Change name parameter of GST_PLUGIN_DEFINE() to not take a string anymore

This will be needed when we later add support for static linking
of plugins without introducing new API or changing existing API.

docs/pwg/building-boiler.xml

@@ -434,7 +434,7 @@ plugin_init (GstPlugin *plugin)
 GST_PLUGIN_DEFINE (
   GST_VERSION_MAJOR,
   GST_VERSION_MINOR,
-  "my_filter",
+  my_filter,
   "My filter plugin",
   plugin_init,
   VERSION,

gst/gstplugin.h

@@ -260,7 +260,7 @@ G_BEGIN_DECLS \
 GST_PLUGIN_EXPORT GstPluginDesc gst_plugin_desc = {	\
   major,						\
   minor,						\
-  name,							\
+ #name,						        \
   (gchar *) description,				\
   init,							\
   version,						\

plugins/elements/gstelements.c

@@ -93,6 +93,6 @@ plugin_init (GstPlugin * plugin)
 
 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
     GST_VERSION_MINOR,
-    "coreelements",
+    coreelements,
     "standard GStreamer elements",
     plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN);