malloc some advances

Bug: 13506939
Change-Id: I87ad616960c4f16bc55d8b906049dbd4f001d6a5
(cherry picked from commit 3af2a37e05)

core/jni/android/graphics/Paint.cpp

@@ -512,7 +512,7 @@ public:
                 return 0;
             }
         }
-        jfloat advancesArray[count];
+        jfloat* advancesArray = new jfloat[count];
         jfloat totalAdvance = 0;
 
         TextLayout::getTextRunAdvances(paint, text, start, count, contextCount, flags,
@@ -521,6 +521,7 @@ public:
         if (advances != NULL) {
             env->SetFloatArrayRegion(advances, advancesIndex, count, advancesArray);
         }
+        delete [] advancesArray;
         return totalAdvance;
     }