Use generated shim headers for zlib.

third_party/zlib/contrib/minizip/mztools.c

 /*
   Additional tools for Minizip
   Code: Xavier Roche '2004
   License: Same as ZLIB (www.gzip.org)
 */
 
 /* Code */
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#if defined(USE_SYSTEM_ZLIB)
-#include <zlib.h>
-#else
 #include "third_party/zlib/zlib.h"
-#endif
 #include "unzip.h"
 
 #define READ_8(adr)  ((unsigned char)*(adr))
 #define READ_16(adr) ( READ_8(adr) | (READ_8(adr+1) << 8) )
 #define READ_32(adr) ( READ_16(adr) | (READ_16((adr)+2) << 16) )
 
 #define WRITE_8(buff, n) do { \
   *((unsigned char*)(buff)) = (unsigned char) ((n) & 0xff); \
 } while(0)
 #define WRITE_16(buff, n) do { \
@@ skipping 250 matching lines @@
       }
       if (bytesRecovered != NULL) {
         *bytesRecovered = totalBytes;
       }
     }
   } else {
     err = Z_STREAM_ERROR;
   }
   return err;
 }