Fix support for custom views in library on ADT's side.

Don't check for final field when parsing R.java (in libraries
fields are not final anymore) and fix a bug in the new
aaptparser which would return a failed to parse aapt error
when the output is empty.

Also add customview in library test app.
diff --git a/testapps/customViewTest/libWithCustomView/ant.properties b/testapps/customViewTest/libWithCustomView/ant.properties
new file mode 100644
index 0000000..ee52d86
--- /dev/null
+++ b/testapps/customViewTest/libWithCustomView/ant.properties
@@ -0,0 +1,17 @@
+# This file is used to override default values used by the Ant build system.
+#
+# This file must be checked in Version Control Systems, as it is
+# integral to the build system of your project.
+
+# This file is only used by the Ant script.
+
+# You can use this to override default values such as
+#  'source.dir' for the location of your java source folder and
+#  'out.dir' for the location of your output folder.
+
+# You can also use it define how the release builds are signed by declaring
+# the following properties:
+#  'key.store' for the location of your keystore and
+#  'key.alias' for the name of the key to use.
+# The password will be asked during the build when you use the 'release' target.
+