Moved apk in HACKING.md to packaging section.

HACKING.md

@@ -70,16 +70,6 @@ There are a few options for running the application:
     then load the build/crx directory as an unpacked extension in Chrome
     developer mode. (The build can't currently make full .crx packages.)
 
-*   Build the files for Android with:
-
-        grunt apk
-
-    This will build two apks in build/ named AppName_{x86,arm}.apk.
-    Install the appropriate one to your device as usual - for
-    example, ```adb install -r build/AppName_x86.apk```.
-    Building packages for Android requires some set up - please see
-    [crosswalk-apk-generator README.md](https://github.com/crosswalk-project/crosswalk-apk-generator/blob/master/README.md#pre-requisites).
-
 # PACKAGING
 
 To sign the app, grunt needs to know the location of your Tizen SDK
@@ -113,6 +103,17 @@ CSS, and HTML) using:
 Note that in both cases, the files comprising the packages are
 first copied into the build/wgt and build/sdk directories respectively.
 
+To creat packages for Android use the 'apk' target:
+
+    grunt apk
+
+This will first build an 'xpk' target and then package two apks in
+build/ named AppName_{x86,arm}.apk.
+You can then install the appropriate one to your device as usual -
+for example, ```adb install -r build/AppName_x86.apk```.
+Packaging for Android requires some set up - please see
+[crosswalk-apk-generator README.md](https://github.com/crosswalk-project/crosswalk-apk-generator/blob/master/README.md#pre-requisites).
+
 # GUIDE FOR MS WINDOWS USERS AND TIZEN IDE
 
 Here are some steps to help people wishing to generate code for use in the Tizen IDE on Microsoft Windows.