Small potential performance improvement for fonts rendering.

Change-Id: If59c1e7803b84340fbc8b31ce6171ef0e5dc6189
diff --git a/libs/hwui/FontRenderer.cpp b/libs/hwui/FontRenderer.cpp
index 8389e56..1b21aee 100644
--- a/libs/hwui/FontRenderer.cpp
+++ b/libs/hwui/FontRenderer.cpp
@@ -482,9 +482,9 @@
     }
 
     glGenBuffers(1, &mIndexBufferID);
-    glBindBuffer(GL_ARRAY_BUFFER, mIndexBufferID);
-    glBufferData(GL_ARRAY_BUFFER, indexBufferSizeBytes, indexBufferData, GL_DYNAMIC_DRAW);
-    glBindBuffer(GL_ARRAY_BUFFER, 0);
+    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, mIndexBufferID);
+    glBufferData(GL_ELEMENT_ARRAY_BUFFER, indexBufferSizeBytes, indexBufferData, GL_STATIC_DRAW);
+    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
 
     free(indexBufferData);