Allow openSUSE tumbleweed

Change-Id: I2ab7f5d2a30620b12bd345d6102a3d381ee5d5ec
Signed-off-by: Marco Varlese <marco.varlese@suse.com>
diff --git a/Makefile b/Makefile
index 1c6fafa..54a2998 100644
--- a/Makefile
+++ b/Makefile
@@ -53,7 +53,7 @@
 
 ifeq ($(filter ubuntu debian,$(OS_ID)),$(OS_ID))
 PKG=deb
-else ifeq ($(filter rhel centos fedora opensuse opensuse-leap,$(OS_ID)),$(OS_ID))
+else ifeq ($(filter rhel centos fedora opensuse opensuse-leap opensuse-tumbleweed,$(OS_ID)),$(OS_ID))
 PKG=rpm
 endif