Output EXTRALIBS_MEDIA from wx-config when using static media lib

This should fix linking of the applications using static media library,
notably under macOS, where they must link with AV{Foundation,Kit}
frameworks.

wx-config.in

@@ -1029,6 +1029,7 @@ ldlibs_base="@WXCONFIG_LIBS@"
 ldlibs_core="@EXTRALIBS_GUI@ @EXTRALIBS_SDL@"
 ldlibs_gl="@OPENGL_LIBS@"
 ldlibs_html="@EXTRALIBS_HTML@"
+ldlibs_media="@EXTRALIBS_MEDIA@"
 ldlibs_xml="@EXTRALIBS_XML@"
 ldlibs_stc="@EXTRALIBS_STC@"
 ldlibs_webview="@EXTRALIBS_WEBVIEW@"