CBLT-202:  direct maven output to android_package.log

Change-Id: I32afbb8564478fba3152157f381c6a56b7df459e
Reviewed-on: http://review.couchbase.org/34701
Reviewed-by: Philip Labee <philip@couchbase.com>
Tested-by: Philip Labee <philip@couchbase.com>