contrib: osmo-bts now depends on libosmo-netif

Since osmo-bts.git a2dc808acc5b99122e97c9013cb1ec2ae0c4a2a1, osmo-bts
depends on libosmo-netif. Let's add the dependency when building.

Change-Id: I8e40b2de19ecfca084780f69808c7030817e43d7
diff --git a/contrib/jenkins-build-osmo-bts-oc2g.sh b/contrib/jenkins-build-osmo-bts-oc2g.sh
index 41eac19..6d660ef 100755
--- a/contrib/jenkins-build-osmo-bts-oc2g.sh
+++ b/contrib/jenkins-build-osmo-bts-oc2g.sh
@@ -26,6 +26,7 @@
 
 build_repo libosmocore --disable-pcsc --disable-libmnl --disable-doxygen --disable-gnutls --disable-detect-tls-gcc-arm-bug
 build_repo libosmo-abis --disable-dahdi
+build_repo libosmo-netif --disable-doxygen
 build_repo osmo-bts --disable-sysmocom-bts --enable-oc2g --with-oc2g="$L1_OC2G_HEADERS"
 
 create_bin_tgz osmo-bts-oc2g