MB-8049: add missing xdcr module to Makefile
MB-8049: add missing xdcr module to Makefile

Change-Id: I30c2b9f90c3881480a3047a61b4427ff4f2f9ac6

couchbaselabs/couchbase-cli,couchbase/couchbase-cli,couchbase/couchbase-cli,couchbaselabs/couchbase-cli,couchbaselabs/couchbase-cli