Add missing CFLAGS and LDADD to unit tests

A number of unit tests needed to be told where to find their libraries
and matching headers.

tests/isc/Makefile.am

@@ -70,6 +70,14 @@ md_test_LDADD =		\
 	$(LDADD)	\
 	$(OPENSSL_LIBS)
 
+netmgr_test_CPPFLAGS =	\
+	$(AM_CPPFLAGS)	\
+	$(OPENSSL_CFLAGS)
+
+netmgr_test_LDADD =	\
+	$(LDADD)	\
+	$(OPENSSL_LIBS)
+
 random_test_LDADD =	\
 	$(LDADD)	\
 	-lm

tests/isccfg/Makefile.am

@@ -4,12 +4,14 @@ AM_CPPFLAGS +=			\
 	$(LIBISC_CFLAGS)	\
 	$(LIBDNS_CFLAGS)	\
 	$(LIBISCCFG_CFLAGS)	\
+	$(LIBUV_CFLAGS)		\
 	-I$(top_srcdir)/lib/isc
 
 LDADD +=			\
 	$(LIBISC_LIBS)		\
 	$(LIBDNS_LIBS)		\
-	$(LIBISCCFG_LIBS)
+	$(LIBISCCFG_LIBS)	\
+	$(LIBUV_LIBS)
 
 check_PROGRAMS =		\
 	duration_test		\

tests/ns/Makefile.am

@@ -4,13 +4,15 @@ AM_CPPFLAGS +=			\
 	$(LIBISC_CFLAGS)	\
 	$(LIBDNS_CFLAGS)	\
 	$(LIBNS_CFLAGS)		\
+	$(LIBUV_CFLAGS)		\
 	-I$(top_srcdir)/lib/isc	\
 	-I$(top_srcdir)/lib/dns
 
 LDADD +=			\
 	$(LIBISC_LIBS)		\
 	$(LIBDNS_LIBS)		\
-	$(LIBNS_LIBS)
+	$(LIBNS_LIBS)		\
+	$(LIBUV_LIBS)
 
 check_PROGRAMS =		\
 	listenlist_test		\