network: add separate log category

the network (mgcp_network.c) part and the protocol part
(mgcp_protoocl.c) share a single loglevel DLMGCP. This
makes debuging hard because when debugging the protocol
we also get the log output from the RTP packets.

assign the network part a private loglevel and keep DLMGCP
for the directly MGCP related code

Change-Id: I55a2711798d1d1c2c9ef2f3b7ebb8fdd78bd6ea2
diff --git a/include/osmocom/mgcp/Makefile.am b/include/osmocom/mgcp/Makefile.am
index cd8f599..d706807 100644
--- a/include/osmocom/mgcp/Makefile.am
+++ b/include/osmocom/mgcp/Makefile.am
@@ -5,4 +5,5 @@
 	mgcp_stat.h \
 	mgcp_ep.h \
 	mgcp_sdp.h \
+	debug.h \
 	$(NULL)