Remove local libgsupclient; Use libosmo-gsup-client from osmo-hlr

osmo-hlr has recently (as of Change-Id
Iad227bb477d64da30dd6bfbbe1bd0c0a55be9474) a working shared library
implementation of libosmo-gsup-client.

We can remove the local implementation in osmo-msc and use the
system-installed shared library instead.

Change-Id: I6f542945403cf2e3ddac419186b09ec0e2d43b69
diff --git a/src/osmo-msc/Makefile.am b/src/osmo-msc/Makefile.am
index 42bc69f..bcc4ada 100644
--- a/src/osmo-msc/Makefile.am
+++ b/src/osmo-msc/Makefile.am
@@ -17,6 +17,7 @@
 	$(LIBASN1C_CFLAGS) \
 	$(LIBOSMOSIGTRAN_CFLAGS) \
 	$(LIBOSMOMGCPCLIENT_CFLAGS) \
+	$(LIBOSMOGSUPCLIENT_CFLAGS) \
 	$(NULL)
 
 AM_LDFLAGS = \
@@ -34,7 +35,6 @@
 osmo_msc_LDADD = \
 	$(top_builddir)/src/libmsc/libmsc.a \
 	$(top_builddir)/src/libvlr/libvlr.a \
-	$(top_builddir)/src/libgsupclient/libgsupclient.a \
 	$(LIBOSMOGSM_LIBS) \
 	$(LIBOSMOVTY_LIBS) \
 	$(LIBOSMOCORE_LIBS) \
@@ -43,6 +43,7 @@
 	$(LIBSMPP34_LIBS) \
 	$(LIBOSMOSIGTRAN_LIBS) \
 	$(LIBOSMOMGCPCLIENT_LIBS) \
+	$(LIBOSMOGSUPCLIENT_LIBS) \
 	-ldbi \
 	$(NULL)
 if BUILD_IU