Small doc update and make CleanSpec.mk empty to avoid confusion.

Change-Id: I2caa5b377f2e9ebeb543cda6e108ff87bc9de772
diff --git a/CHANGES.TXT b/CHANGES.TXT
index 08099f0..c759716 100644
--- a/CHANGES.TXT
+++ b/CHANGES.TXT
@@ -20,6 +20,22 @@
    5.0  => current
 
 ==============================================================================
+Changes between 6.0 and 5.0
+
+IMPORTANT CHANGES:
+
+- Add a '-memcheck' option to instrument memory reads/writes at runtime in
+  order to detect buffer under/overflows. This requires a new version of the
+  C library that is only available in Froyo and above.
+
+OTHER:
+
+- Add a '--static' option to both android-configure.sh and android-rebuild.sh
+  in order to build a completely static executable. This is required to run
+  the emulator in restricted environments. No audio and graphics in this mode
+  so using '-no-window' is required.
+
+==============================================================================
 Changes between 5.0 and 1.13
 
 IMPORTANT CHANGES:
diff --git a/CleanSpec.mk b/CleanSpec.mk
index b84e1b6..0bfecdc 100644
--- a/CleanSpec.mk
+++ b/CleanSpec.mk
@@ -1,49 +1,3 @@
-# Copyright (C) 2007 The Android Open Source Project
+# This empty file is here solely for the purpose of optimizing the Android build
+# Please keep it there, and empty, thanks :-)
 #
-# 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.
-#
-
-# If you don't need to do a full clean build but would like to touch
-# a file or delete some intermediate files, add a clean step to the end
-# of the list.  These steps will only be run once, if they haven't been
-# run before.
-#
-# E.g.:
-#     $(call add-clean-step, touch -c external/sqlite/sqlite3.h)
-#     $(call add-clean-step, rm -rf $(PRODUCT_OUT)/obj/STATIC_LIBRARIES/libz_intermediates)
-#
-# Always use "touch -c" and "rm -f" or "rm -rf" to gracefully deal with
-# files that are missing or have been moved.
-#
-# Use $(PRODUCT_OUT) to get to the "out/target/product/blah/" directory.
-# Use $(OUT_DIR) to refer to the "out" directory.
-#
-# If you need to re-do something that's already mentioned, just copy
-# the command and add it to the bottom of the list.  E.g., if a change
-# that you made last week required touching a file and a change you
-# made today requires touching the same file, just copy the old
-# touch step and add it to the end of the list.
-#
-# ************************************************
-# NEWER CLEAN STEPS MUST BE AT THE END OF THE LIST
-# ************************************************
-
-# For example:
-#$(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/APPS/AndroidTests_intermediates)
-#$(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/JAVA_LIBRARIES/core_intermediates)
-#$(call add-clean-step, find $(OUT_DIR) -type f -name "IGTalkSession*" -print0 | xargs -0 rm -f)
-#$(call add-clean-step, rm -rf $(PRODUCT_OUT)/data/*)
-
-# ************************************************
-# NEWER CLEAN STEPS MUST BE AT THE END OF THE LIST
-# ************************************************