move to osmo-mgw.git: osmo-bsc_mgcp and libmgcp as libosmo-legacy-mgcp

Rewire build and includes to libosmo-legacy-mgcp.

Drop osmo-bsc_mgcp and related python tests, now found in osmo-mgw.git.

libosmo-legacy-mgcp is installed from osmo-mgw, hence add the dependency to
jenkins.sh (so far using the pre_release branch).

Change-Id: Ic99d681759edce11564da62500c2aac5cf5fffe2
diff --git a/contrib/jenkins.sh b/contrib/jenkins.sh
index 2b667ad..7380189 100755
--- a/contrib/jenkins.sh
+++ b/contrib/jenkins.sh
@@ -29,6 +29,7 @@
 osmo-build-dep.sh libosmo-sccp
 PARALLEL_MAKE="" osmo-build-dep.sh libsmpp34
 osmo-build-dep.sh openggsn
+osmo-build-dep.sh osmo-mgw pre_release # move to 'master' once the split is complete
 
 if [ "x$IU" = "x--enable-iu" ]; then
 	osmo-build-dep.sh libasn1c