osmo-bsc_mgcp: Add LIBOSMONETIF_{CFLAGS,LIBS}

The osmo-mgw gerrit build is currently failing with the following error:

make[3]: Entering directory '/build/src/osmo-bsc_mgcp'
  CC       mgcp_main.o
In file included from ../../include/osmocom/legacy_mgcp/mgcp_internal.h:146:0,
                 from mgcp_main.c:36:
../../include/osmocom/legacy_mgcp/osmux.h:4:33: fatal error: osmocom/netif/osmux.h: No such file or directory
 #include <osmocom/netif/osmux.h>
                                 ^
compilation terminated.

Let's make sure we're adding the required flags/libs for libosmonetif dependency

Related: OS#2829
Change-Id: I402314532590498a6340dc14101a32b605cd5e09
diff --git a/src/osmo-bsc_mgcp/Makefile.am b/src/osmo-bsc_mgcp/Makefile.am
index 4529a33..e8a6f46 100644
--- a/src/osmo-bsc_mgcp/Makefile.am
+++ b/src/osmo-bsc_mgcp/Makefile.am
@@ -8,6 +8,7 @@
 	-Wall \
 	$(LIBOSMOCORE_CFLAGS) \
 	$(LIBOSMOVTY_CFLAGS) \
+	$(LIBOSMONETIF_CFLAGS) \
 	$(LIBBCG729_CFLAGS) \
 	$(COVERAGE_CFLAGS) \
 	$(NULL)
@@ -24,6 +25,7 @@
 	$(top_builddir)/src/libosmo-legacy-mgcp/libosmo-legacy-mgcp.la \
 	$(LIBOSMOCORE_LIBS) \
 	$(LIBOSMOVTY_LIBS) \
+	$(LIBOSMONETIF_LIBS) \
 	$(LIBBCG729_LIBS) \
 	$(LIBRARY_GSM) \
 	$(NULL)
diff --git a/src/osmo-mgw/Makefile.am b/src/osmo-mgw/Makefile.am
index 0e12beb..3cbddf5 100644
--- a/src/osmo-mgw/Makefile.am
+++ b/src/osmo-mgw/Makefile.am
@@ -8,6 +8,7 @@
 	-Wall \
 	$(LIBOSMOCORE_CFLAGS) \
 	$(LIBOSMOVTY_CFLAGS) \
+	$(LIBOSMONETIF_CFLAGS) \
 	$(COVERAGE_CFLAGS) \
 	$(NULL)
 
@@ -23,4 +24,5 @@
 	$(top_builddir)/src/libosmo-mgcp/libosmo-mgcp.la \
 	$(LIBOSMOCORE_LIBS) \
 	$(LIBOSMOVTY_LIBS) \
+	$(LIBOSMONETIF_LIBS) \
 	$(NULL)