Fix text rendering issue with text scaling.

Change-Id: I1f3ae40025697e8f8ca0616ee6550fe215cadcc8
diff --git a/libs/hwui/FontRenderer.h b/libs/hwui/FontRenderer.h
index a03ea92..de5c019 100644
--- a/libs/hwui/FontRenderer.h
+++ b/libs/hwui/FontRenderer.h
@@ -94,6 +94,9 @@
         // Values below contain a glyph's origin in the bitmap
         int32_t mBitmapLeft;
         int32_t mBitmapTop;
+        // Auto-kerning
+        SkFixed mLsbDelta;
+        SkFixed mRsbDelta;
     };
 
     Font(FontRenderer* state, uint32_t fontId, float fontSize);