android: Update build system for recent SDK versions and target ice cream sandwich.

As a result, the java parts can now be build using ant (in the android dir).
Just issue "ant debug" after "make libs". Building the java parts from eclipse
also still works.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@31543 a1c6a512-1295-4272-9138-f99709370657
diff --git a/android/.classpath b/android/.classpath
index 6efcbb7..1b4b1ee 100644
--- a/android/.classpath
+++ b/android/.classpath
@@ -3,5 +3,5 @@
 	<classpathentry kind="con" path="com.android.ide.eclipse.adt.ANDROID_FRAMEWORK"/>
 	<classpathentry kind="src" path="src"/>
 	<classpathentry kind="src" path="gen"/>
-	<classpathentry kind="output" path="bin"/>
+	<classpathentry kind="output" path="bin/classes"/>
 </classpath>