Add tool to generate cscope file for aosp

tools/aosp_cscope

@@ -0,0 +1,45 @@
+DIR="dalvik device frameworks hardware libnativehelper system packages"
+TMP=$(mktemp /tmp/XXXXX-cscope.files)
+
+gettop ()
+{
+    local TOPFILE=build/core/envsetup.mk;
+    if [ -n "$TOP" -a -f "$TOP/$TOPFILE" ]; then
+        echo $TOP;
+    else
+        if [ -f $TOPFILE ]; then
+            PWD= /bin/pwd;
+        else
+            local HERE=$PWD;
+    T=;
+    while [ \( ! \( -f $TOPFILE \) \) -a \( $PWD != "/" \) ]; do
+        \cd ..;
+    T=`PWD= /bin/pwd`;
+    done;
+    \cd $HERE;
+    if [ -f "$T/$TOPFILE" ]; then
+        echo $T;
+    fi;
+    fi;
+    fi
+}
+
+
+T=$(gettop);
+if [ "$T" ]; then
+	\cd $(gettop);
+else
+	echo "Couldn't locate the top of the tree.  Try setting TOP.";
+	exit
+fi
+
+for dir in $DIR;
+do
+	echo "Looking for files in $dir"
+	find $PWD/$dir -name .git -prune -o -type f \( -iname '*.c' -o -iname '*.cc' -o -iname '*.cpp' -o -iname '*.h' -o -iname '*.hpp' -o -iname "*.mk" -o -iname "*.java" -o -iname "*.aidl" \) | egrep -v "/\.git$" >> $TMP
+done
+
+echo "generate cscope"
+cscope -bkq -i $TMP
+
+rm $TMP