wt-status: turn advice_status_hints into a field of wt_status

No behavior change in this patch, but this makes the display of status
hints more flexible as they can be enabled or disabled for individual
calls to commit.c:run_status().

Signed-off-by: Matthieu Moy <Matthieu.Moy@imag.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/wt-status.h b/wt-status.h
index fb7152e..b4c9cb4 100644
--- a/wt-status.h
+++ b/wt-status.h
@@ -59,6 +59,7 @@
 	unsigned colopts;
 	int null_termination;
 	int show_branch;
+	int hints;
 
 	/* These are computed during processing of the individual sections */
 	int commitable;