Fix build on Ubuntu

Linked libraries supposed to come _after_ the objects which uses
functions from them.
diff --git a/src/Makefile b/src/Makefile
index adc3e89..d2536b5 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -6,10 +6,10 @@
 all: db_test hlr
 
 db_test: db_test.o rand_fake.o $(OBJS)
-	$(CC) $(LDFLAGS) -o $@ $^
+	$(CC) -o $@ $^ $(LDFLAGS)
 
 hlr: hlr.o gsup_server.o gsup_router.o rand_urandom.o $(OBJS)
-	$(CC) $(LDFLAGS) -o $@ $^
+	$(CC) -o $@ $^ $(LDFLAGS)
 
 %.o: %.c
 	$(CC) $(CFLAGS) -o $@ -c $^