Bug #38374 --> more updates for external helper application support. (NOT PART OF THE BUILD)

code review will come when this is done and gets turned on.

adding manifest files for the mac build

uriloader/exthandler/MANIFEST

@@ -0,0 +1,25 @@
+# The contents of this file are subject to the Netscape Public
+# License Version 1.1 (the "License"); you may not use this file
+# except in compliance with the License. You may obtain a copy of
+# the License at http://www.mozilla.org/NPL/
+#
+# Software distributed under the License is distributed on an "AS
+# IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
+# implied. See the License for the specific language governing
+# rights and limitations under the License.
+#
+# The Original Code is mozilla.org code.
+#
+# The Initial Developer of the Original Code is Netscape
+# Communications Corporation.  Portions created by Netscape are
+# Copyright (C) 1998 Netscape Communications Corporation. All
+# Rights Reserved.
+#
+# Contributor(s): 
+#
+# This is a list of local files which get copied to the mozilla:dist:uriloader directory
+#
+
+nsHelperAppRDF.h
+
+

uriloader/exthandler/MANIFEST_IDL

@@ -0,0 +1,8 @@
+#
+# This is a list of local files which get copied to the mozilla:dist:idl directory
+#
+
+nsIExternalHelperAppService.idl
+nsCExternalHandlerService.idl
+nsIExternalProtocolService.idl
+