List all CIRROS ARCH images in image_list.sh

image_list.sh is used to make a list of all possible images. Loop over
both x86_64 and i386 instead of just using the default arch of x86_64

For live migration we are starting to use the i386 arch based images and
don't want to cache them like all other images.

Change-Id: I47da72a0e9da3689cb085bb43ac6536094445112
diff --git a/tools/image_list.sh b/tools/image_list.sh
index 0bb49ab..88c1d09 100755
--- a/tools/image_list.sh
+++ b/tools/image_list.sh
@@ -9,6 +9,8 @@
 # dummy in the end position to trigger the fall through case.
 DRIVERS="openvz ironic libvirt vsphere xenserver dummy"
 
+CIRROS_ARCHS="x86_64 i386"
+
 # Extra variables to trigger getting additional images.
 export ENABLED_SERVICES="h-api,tr-api"
 HEAT_FETCHED_TEST_IMAGE="Fedora-i386-20-20131211.1-sda"
@@ -17,12 +19,15 @@
 # Loop over all the virt drivers and collect all the possible images
 ALL_IMAGES=""
 for driver in $DRIVERS; do
-    VIRT_DRIVER=$driver
-    URLS=$(source $TOP_DIR/stackrc && echo $IMAGE_URLS)
-    if [[ ! -z "$ALL_IMAGES" ]]; then
-        ALL_IMAGES+=,
-    fi
-    ALL_IMAGES+=$URLS
+    for arch in $CIRROS_ARCHS; do
+        CIRROS_ARCH=$arch
+        VIRT_DRIVER=$driver
+        URLS=$(source $TOP_DIR/stackrc && echo $IMAGE_URLS)
+        if [[ ! -z "$ALL_IMAGES" ]]; then
+            ALL_IMAGES+=,
+        fi
+        ALL_IMAGES+=$URLS
+    done
 done
 
 # Make a nice list