common.sh: exclude vm files for factory image

We already exclude all container stuff, should do same
for all vm stuff.

BUG=b:155455729
TEST=manual - ./build_image --board=eve-arc-r factory_install

Change-Id: I4a53f745ba482a6f5e0105215b7981e2c0882523
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosutils/+/2183223
Commit-Queue: Lepton Wu <lepton@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
Tested-by: Lepton Wu <lepton@chromium.org>
Auto-Submit: Lepton Wu <lepton@chromium.org>
Reviewed-by: Yusuke Sato <yusukes@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
diff --git a/common.sh b/common.sh
index 50394e2..dd1570c 100644
--- a/common.sh
+++ b/common.sh
@@ -443,6 +443,7 @@
   ${DEFAULT_INSTALL_MASK}
   /opt/google/chrome
   /opt/google/containers
+  /opt/google/vms
   /usr/lib64/dri
   /usr/lib/dri
   /usr/share/X11