bionic: fix deleting property arrays in property benchmark

Use delete[] to delete arrays allocated with new []

Change-Id: Icc2a6b23df09049c008f7f1f50ed93a277174308
diff --git a/tests/property_benchmark.cpp b/tests/property_benchmark.cpp
index 5acd06c..2c8e2a1 100644
--- a/tests/property_benchmark.cpp
+++ b/tests/property_benchmark.cpp
@@ -62,10 +62,10 @@
             delete names[i];
             delete values[i];
         }
-        delete names;
-        delete name_lens;
-        delete values;
-        delete value_lens;
+        delete[] names;
+        delete[] name_lens;
+        delete[] values;
+        delete[] value_lens;
         free(pa);
     }
 public: