configure: note dep on head.

graydon · graydon · commit e0b71dd6b3ba · 2012-10-18T14:51:20.000-07:00
diff --git a/configure b/configure
@@ -187,6 +187,7 @@ need_cmd cmp
 need_cmd mkdir
 need_cmd printf
 need_cmd cut
+need_cmd head
 need_cmd grep
 need_cmd xargs
 need_cmd cp
