add better support for IWYU and fix things

Remove the "make iwyu" build target. Move the functionality into the
recently introduced lint.fish script. Fix a lot, but not all, of the
include-what-you-use errors. Specifically, it fixes all of the IWYU errors
on my OS X server but only removes some of them on my Ubuntu 14.04 server.

Fixes #2957

1 files changed, 2 insertions, 1 deletions

diff --git a/src/path.h b/src/path.h
index eec776a6..ae958b68 100644
--- a/src/path.h
+++ b/src/path.h
@@ -5,11 +5,12 @@
   name can be found in the PATH, and various other path-related
   issues.
 */
-
 #ifndef FISH_PATH_H
 #define FISH_PATH_H
 
 #include <stddef.h>
+#include <stdbool.h>
+
 #include "common.h"
 #include "env.h"