Chore: Update common-packer to the latest v0.9.4

Signed-off-by: Anil Belur <abelur@linuxfoundation.org>
Change-Id: I8b2d6da20bab8e1051da1699ea61fdb35320f14b

diff --git a/packer/common-packer b/packer/common-packer
index c93dddaeb54c0cf1c8f8371f4431d91416292cf0..3dcae183d810816f31950afbe1fa08fa948e61fe 160000 (submodule)
--- a/packer/common-packer
+++ b/packer/common-packer
@@ -1 +1 @@
-Subproject commit c93dddaeb54c0cf1c8f8371f4431d91416292cf0
+Subproject commit 3dcae183d810816f31950afbe1fa08fa948e61fe