[Android] Set build.is.packaging.debug correctly

build/android/ant/apk-package.xml

 <?xml version="1.0" encoding="UTF-8"?>
 <!--
     Copyright (C) 2005-2008 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
 
@@ skipping 16 matching lines @@
     <pathelement path="${sdk.dir}/tools/lib/anttasks.jar" />
   </path>
 
   <!-- Custom tasks -->
   <taskdef resource="anttasks.properties" classpathref="android.antlibs" />
 
   <condition property="build.target" value="release" else="debug">
     <equals arg1="${CONFIGURATION_NAME}" arg2="Release" />
   </condition>
   <condition property="build.is.packaging.debug" value="true" else="false">
-    <equals arg1="build.target" arg2="debug" />
+    <equals arg1="${build.target}" arg2="debug" />
   </condition>
 
   <!-- Disables automatic signing. -->
   <property name="build.is.signing.debug" value="false"/>
 
   <!-- SDK tools assume that out.packaged.file is signed and name it "...-unaligned" -->
   <property name="out.packaged.file" value="${UNSIGNED_APK_PATH}" />
 
   <property name="native.libs.absolute.dir" location="${NATIVE_LIBS_DIR}" />
 
@@ skipping 17 matching lines @@
         verbose="${verbose}"
         hascode="true"
         previousBuildType="/"
         buildType="${build.is.packaging.debug}/${build.is.signing.debug}">
       <dex path="${intermediate.dex.file}"/>
       <sourcefolder path="${source.absolute.dir}"/>
       <nativefolder path="${native.libs.absolute.dir}" />
     </apkbuilder>
   </target>
 </project>