Ensure that init depends on FIO-VERSION-FILE

Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/Makefile b/Makefile
index f8fbc70..fe22741 100644
--- a/Makefile
+++ b/Makefile
@@ -114,6 +114,9 @@
 .c.o: .depend FORCE
 	$(QUIET_CC)$(CC) -o $@ -c $(CFLAGS) $(CPPFLAGS) $<
 
+init.o: FIO-VERSION-FILE
+	$(QUIET_CC)$(CC) -o init.o -c $(CFLAGS) $(CPPFLAGS) -c init.c
+
 gcompat.o: gcompat.c gcompat.h
 	$(QUIET_CC)$(CC) $(CFLAGS) $(GTK_CFLAGS) $(CPPFLAGS) -c gcompat.c