Support for delta-q at superblock level

Change-Id: I4128af44776d1f361bddc1fdffb75ed2224dbfa5
diff --git a/configure b/configure
index 4e9a52c..c396632 100755
--- a/configure
+++ b/configure
@@ -285,6 +285,7 @@
     daala_ec
     cb4x4
     frame_size
+    delta_q
 "
 CONFIG_LIST="
     dependency_tracking