Makefile: Added dbkg target

git-svn-id: http://svn.igniterealtime.org/svn/repos/openfire/trunk@13524 b35dd754-fafc-0310-a699-88a17e54d16e

Makefile

-.PHONY: all clean eclipse
+.PHONY: all clean dbkg eclipse
 
 all: build-openfire
 
@@ -10,6 +10,9 @@ build-openfire:
 clean:
 	cd build && ant clean
 
+dbkg:
+	cd build && ant installer.debian
+
 eclipse: .settings .classpath .project
 
 .settings: