core: yet more consistent usage of libnl CFLAGS and LIBS

This patch has been used in OpenEmbedded [1] since commit b167a9a9 [2][3].

[1] http://www.openembedded.org/
[2] http://cgit.openembedded.org/cgit.cgi/openembedded/commit/recipes/networkmanager/networkmanager/0002-respect-libnl-flags-also-in-dns-manager-vpn-manager-.patch?id=b167a9a9e55a7a493a7ee565cec9c7dd463362ff
[3] http://cgit.openembedded.org/cgit.cgi/openembedded/commit/?id=b167a9a9e55a7a493a7ee565cec9c7dd463362ff

Signed-off-by: Philip Balister <philip@balister.org>

src/dns-manager/Makefile.am

@@ -19,12 +19,14 @@ libdns_manager_la_SOURCES = \
 	nm-dns-utils.c
 
 libdns_manager_la_CPPFLAGS = \
+	$(LIBNL_CFLAGS) \
 	$(DBUS_CFLAGS) \
 	$(GLIB_CFLAGS) \
 	-DLOCALSTATEDIR=\"$(localstatedir)\"
 
 libdns_manager_la_LIBADD = \
 	$(top_builddir)/src/logging/libnm-logging.la \
+	$(LIBNL_LIBS) \
 	$(DBUS_LIBS) \
 	$(GLIB_LIBS)
 

src/modem-manager/Makefile.am

@@ -19,10 +19,12 @@ libmodem_manager_la_SOURCES = \
 	nm-modem-types.h
 
 libmodem_manager_la_CPPFLAGS = \
+	$(LIBNL_CFLAGS) \
 	$(DBUS_CFLAGS)
 
 libmodem_manager_la_LIBADD = \
 	$(top_builddir)/marshallers/libmarshallers.la \
 	$(top_builddir)/src/logging/libnm-logging.la \
+	$(LIBNL_LIBS) \
 	$(DBUS_LIBS)
 

src/vpn-manager/Makefile.am

@@ -22,6 +22,7 @@ libvpn_manager_la_SOURCES = \
 	nm-vpn-connection.h
 
 libvpn_manager_la_CPPFLAGS =	\
+	$(LIBNL_CFLAGS)		\
 	$(DBUS_CFLAGS)		\
 	$(GLIB_CFLAGS)		\
 	-DG_DISABLE_DEPRECATED
@@ -30,6 +31,7 @@ libvpn_manager_la_LIBADD = \
 	$(top_builddir)/marshallers/libmarshallers.la \
 	$(top_builddir)/src/logging/libnm-logging.la \
 	$(top_builddir)/libnm-util/libnm-util.la \
+	$(LIBNL_LIBS) \
 	$(DBUS_LIBS) \
 	$(GLIB_LIBS)