Add quantal

Allow devstack to run on quantal.

Change-Id: Iec79aa3669dc1dcc695470e6c15957622268476f
Signed-off-by: Chuck Short <chuck.short@canonical.com>
diff --git a/stack.sh b/stack.sh
index 66c8e93..41bce47 100755
--- a/stack.sh
+++ b/stack.sh
@@ -86,7 +86,7 @@
 
 # Warn users who aren't on an explicitly supported distro, but allow them to
 # override check and attempt installation with ``FORCE=yes ./stack``
-if [[ ! ${DISTRO} =~ (oneiric|precise|f16) ]]; then
+if [[ ! ${DISTRO} =~ (oneiric|precise|quantal|f16) ]]; then
     echo "WARNING: this script has been tested on oneiric, precise and f16"
     if [[ "$FORCE" != "yes" ]]; then
         echo "If you wish to run this script anyway run with FORCE=yes"