Install common-packer

Change-Id: I609d57aa043ce3a769e43ecad9951c3e3f157d3e
Signed-off-by: Andrew Grimberg <agrimberg@linuxfoundation.org>
diff --git a/.gitmodules b/.gitmodules
index bffd428..35a54d3 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,6 @@
 [submodule "jjb/global-jjb"]
 	path = jjb/global-jjb
 	url = https://github.com/lfit/releng-global-jjb.git
+[submodule "packer/common-packer"]
+	path = packer/common-packer
+	url = https://github.com/lfit/releng-common-packer