added support of static directory in debian install and Makefile for source package

Makefile

 
 source-package:
 	mkdir -p source_package/jitsi-meet/css && \
-	cp -r *.js *.html connection_optimization favicon.ico fonts images libs sounds LICENSE lang source_package/jitsi-meet && \
+	cp -r *.js *.html connection_optimization favicon.ico fonts images libs static sounds LICENSE lang source_package/jitsi-meet && \
 	cp css/all.css source_package/jitsi-meet/css && \
 	(cd source_package ; tar cjf ../jitsi-meet.tar.bz2 jitsi-meet) && \
 	rm -rf source_package

debian/jitsi-meet-web.install

 *.html					/usr/share/jitsi-meet/
 *.ico					/usr/share/jitsi-meet/
 libs					/usr/share/jitsi-meet/
+static                  /usr/share/jitsi-meet/
 css/all.css 			/usr/share/jitsi-meet/css/
 sounds					/usr/share/jitsi-meet/
 fonts					/usr/share/jitsi-meet/