Fix build error when libcap-dev is installed (#798)

* Fix build error when libcap-dev is installed

* Revert 829ba29, allowing LDLIBS based fix to work

Makefile.in

@@ -78,8 +78,6 @@ src/example_sn_embed.o: $(N2N_DEPS)
 src/example_edge_embed.o: $(N2N_DEPS)
 
 src/edge: $(N2N_LIB)
-	$(CC) $(CFLAGS) $< $(LDFLAGS) $(N2N_LIB) $(LIBS_EDGE) -o $@
-
 src/supernode: $(N2N_LIB)
 src/example_edge_embed_quick_edge_init: $(N2N_LIB)
 src/example_sn_embed: $(N2N_LIB)

configure.seed

@@ -77,7 +77,7 @@ fi
 
 AC_CHECK_LIB([cap], [cap_get_proc], cap=true)
 if test x$cap != x; then
-  LDFLAGS="${LDFLAGS} -lcap"
+  N2N_LIBS="${N2N_LIBS} -lcap"
   AC_DEFINE([HAVE_LIBCAP],[1],[Support for linux capabilities])
 fi