epm dedup: add apt-get dedup from apt-get dedup support

bin/epm-dedup

@@ -51,7 +51,14 @@ epm_dedup()
 {
 case $PMTYPE in
 	apt-rpm)
-		try_fix_apt_rpm_dupls
+		# ALT Linux only
+		assure_exists /usr/share/apt/scripts apt-scripts
+		if [ -f /usr/share/apt/scripts/dedup.lua ] ; then
+			"Check for duplicates via apt-get dedup from apt-scripts"
+			sudocmd apt-get dedup
+		else
+			try_fix_apt_rpm_dupls
+		fi
 		;;
 	*)
 		fatal "Have no suitable command for $PMTYPE"