CBLT-202:  export VERSION and REVISION for use by couchbase-lite-android-liteserv/extra/jenkins_build/build_android_zipfile.sh

Change-Id: Iea1536f2146ab26d9dc0fc50dbce8b8fc15bc20b
Reviewed-on: http://review.couchbase.org/34499
Reviewed-by: Philip Labee <philip@couchbase.com>
Tested-by: Philip Labee <philip@couchbase.com>