deps/libz: Move zutil.h back to deps.

This is an internal zlib header and should not be used by other projects.

See the comment in the file.

/* WARNING: this file should *not* be used by applications. It is
   part of the implementation of the compression library and is
   subject to change. Applications should only use zlib.h.
 */

deps/libz/adler32.c

@@ -8,7 +8,7 @@
 #define ZLIB_INTERNAL
 #include <stdint.h>
 #include <stddef.h>
-#include <zutil.h>
+#include "zutil.h"
 
 #define BASE 65521UL    /* largest prime smaller than 65536 */
 #define NMAX 5552

deps/libz/deflate.h

@@ -13,7 +13,7 @@
 #ifndef DEFLATE_H
 #define DEFLATE_H
 
-#include <zutil.h>
+#include "zutil.h"
 
 /* define NO_GZIP when compiling if you want to disable gzip header and
    trailer creation by deflate().  NO_GZIP would be used to avoid linking in

deps/libz/inffast.c

@@ -3,7 +3,7 @@
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
-#include <zutil.h>
+#include "zutil.h"
 #include "inftrees.h"
 #include "inflate.h"
 #include "inffast.h"

deps/libz/inflate.c

@@ -80,7 +80,7 @@
    * The history for versions after 1.2.0 are in ChangeLog in zlib distribution.
    */
 
-#include <zutil.h>
+#include "zutil.h"
 #include "inftrees.h"
 #include "inflate.h"
 #include "inffast.h"

deps/libz/inftrees.c

@@ -3,7 +3,7 @@
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
-#include <zutil.h>
+#include "zutil.h"
 #include "inftrees.h"
 
 #define MAXBITS 15

deps/libz/zutil.c

@@ -5,7 +5,7 @@
 
 /* @(#) $Id$ */
 
-#include <zutil.h>
+#include "zutil.h"
 #ifndef Z_SOLO
 #  include "gzguts.h"
 #endif