remove warning about not using checked-in debug keystore from release

builds that won't use it regardless

xwords4/android/scripts/common_targets.xml

@@ -16,9 +16,12 @@
     </target>
 
     <target name="my-pre-build">
-      <exec dir="." executable="../scripts/key-setup.sh"
-            failonerror="true"
-            />
+
+        <exec dir="." executable="../scripts/key-setup.sh" failonerror="true"
+              >
+          <arg value="${build.target}"/>
+        </exec>
+
         <exec dir="." executable="../scripts/ndksetup.sh" output="/dev/null"
               failonerror="true">
             <arg value="${build.target}"/>

xwords4/android/scripts/key-setup.sh

@@ -2,15 +2,16 @@
 
 set -e -u
 
-HOMELOC=~/.android/debug.keystore
-HERELOC=$(pwd)/$(dirname $0)/debug.keystore
-# SCRIPTS=
+if [ $1 = 'debug' ]; then
 
-if [ -L $HOMELOC ]; then 
+	HOMELOC=~/.android/debug.keystore
+	HERELOC=$(pwd)/$(dirname $0)/debug.keystore
+
+	if [ -L $HOMELOC ]; then 
 		if cmp $(readlink $HOMELOC) $HERELOC; then
 			exit 0
 		fi
-elif [ -e $HOMELOC ]; then
+	elif [ -e $HOMELOC ]; then
 		cat << EOF
 * You are using a different keystore from what's part of this project.
 * You won't be able to install this over something built from a
@@ -19,7 +20,9 @@ elif [ -e $HOMELOC ]; then
 rm $HOMELOC
 * and rerun ant to use the built-in keystore.
 EOF
-else
+	else
 		echo "$0: creating link at $HOMELOC"
 		ln -sf  $HERELOC $HOMELOC
+	fi
+
 fi