Move debugging info into tech section

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+<!--
+   Copyright 2010 The Android Open Source Project 
+
+   Licensed under the Apache License, Version 2.0 (the "License"); 
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+-->
+
+# Debugging the Android platform #
+
+The following sections contain information, documentation, tips and tricks
+about debugging Android at the platform level, typically during development
+of platform-level features.
+
+[&raquo; Debugging Native Memory Use](/tech/debugging/native-memory.html)