Add XML Extras to the installers. r=sgehani,ssu, sr=brendan@mozilla.org.

xpinstall/packager/packages-mac

@@ -179,6 +179,8 @@ viewer:Components:autocomplete.xpt
 viewer:Components:xml-rpc.xpt
 viewer:Components:nsDictionary.js
 viewer:Components:nsXmlRpcClient.js
+viewer:Components:xmlextras.xpt
+viewer:Components:xmlextras.shlb
 
 viewer:Components:Necko.shlb 
 viewer:Components:Necko2.shlb 

xpinstall/packager/packages-unix

@@ -201,6 +201,8 @@ bin/components/nsDictionary.js
 bin/components/nsXmlRpcClient.js
 bin/components/libxremote_client.so
 bin/components/windowwatcher.xpt
+bin/components/xmlextras.xpt
+bin/components/libxmlextras.so
 
 bin/chrome/toolkit.jar
 bin/chrome/comm.jar

xpinstall/packager/packages-win

@@ -199,6 +199,8 @@ bin\components\xml-rpc.xpt
 bin\components\nsDictionary.js
 bin\components\nsXmlRpcClient.js
 bin\plugins\npnul32.dll
+bin\components\xmlextras.xpt
+bin\components\xmlextras.dll
 
 ; chrome stuff
 bin\chrome\comm\*