add rest of targets for pre-built images

This adds the remaining devices we need to create prebuilt images for
diff --git a/build-images.py b/build-images.py
index 32c87ce..983a0a5 100755
--- a/build-images.py
+++ b/build-images.py
@@ -30,8 +30,15 @@
 
 # a mapping of hwpack name to l-m-c name
 HWPACKS = {
-    'lt-panda': 'panda',
+    'omap3': 'beagle',
     'overo': 'overo',
+    'lt-panda': 'panda',
+    'lt-mx5':'mx53loco',
+    'lt-mx6': 'mx6qsabrelite',
+    'lt-origen': 'origen',
+    'lt-snowball': 'snowball_sd',
+    'lt-vexpress-a9': 'vexpress-a9',
+    'efikamx': 'efikamx',
 }
 # a mapping of binary image to its image_file size
 BINARIES = {