MB-6969 add geocouch to dist bundle

geocouch is needed when building couchbase-server
from source tarball

Change-Id: Iceb27ca258b2ab9f4307fece882b7769890395f8
Reviewed-on: http://review.couchbase.org/21998
Reviewed-by: Volker Mische <volker.mische@gmail.com>
Reviewed-by: Bin Cui <bin.cui@gmail.com>
Reviewed-by: Farshid Ghods <farshid@couchbase.com>
Tested-by: Farshid Ghods <farshid@couchbase.com>

Makefile.top

@@ -63,7 +63,7 @@ all: do-install-all
 DIST_VERSION = `git describe`
 DIST_MANIFEST = manifest.xml
 DIST_PRODUCT = couchbase-server
-DIST_COMPONENTS_EXTRA = couchbase-python-client
+DIST_COMPONENTS_EXTRA = couchbase-python-client geocouch
 DIST_COMPONENTS = $(filter-out libcouchbase, $(COMPONENTS)) $(DIST_COMPONENTS_EXTRA)
 
 dist: