Install common-packer

Issue-ID: CIMAN-33
Change-Id: I75d06fca2740ec41d3d1bcae014e6125d1d360f2
Signed-off-by: Jessica Wagantall <jwagantall@linuxfoundation.org>
diff --git a/.gitmodules b/.gitmodules
index 07b28be..0fbb91a 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
+[submodule "packer/common-packer"]
+	path = packer/common-packer
+	url = https://github.com/lfit/releng-common-packer