Revert to old libminui and fix up

We will wait for CAF to give us a new libminui that supports
qualcomm overlay before moving up to the new format if possible.
Attempt to fix up old libminui to work with new libpng.

Change-Id: I494b7287b347f4730aa8f9d27d4cc17b6e93919a
diff --git a/minui/font_10x18.h b/minui/font_10x18.h
index 29d7053..7f96465 100644
--- a/minui/font_10x18.h
+++ b/minui/font_10x18.h
@@ -3,7 +3,7 @@
   unsigned height;
   unsigned cwidth;
   unsigned cheight;
-  unsigned char rundata[2973];
+  unsigned char rundata[];
 } font = {
   .width = 960,
   .height = 18,