Add an API to unpack Zip files directly from and to file descriptors.

third_party/zlib/contrib/minizip/ioapi.h

 /* ioapi.h -- IO base function header for compress/uncompress .zip
    part of the MiniZip project - ( http://www.winimage.com/zLibDll/minizip.html )
 
          Copyright (C) 1998-2010 Gilles Vollant (minizip) ( http://www.winimage.com/zLibDll/minizip.html )
 
          Modifications for Zip64 support
          Copyright (C) 2009-2010 Mathias Svensson ( http://result42.com )
 
          For more info read MiniZip_info.txt
 
@@ skipping 179 matching lines @@
 voidpf call_zopen64 OF((const zlib_filefunc64_32_def* pfilefunc,const void*filename,int mode));
 long    call_zseek64 OF((const zlib_filefunc64_32_def* pfilefunc,voidpf filestream, ZPOS64_T offset, int origin));
 ZPOS64_T call_ztell64 OF((const zlib_filefunc64_32_def* pfilefunc,voidpf filestream));
 
 void    fill_zlib_filefunc64_32_def_from_filefunc32(zlib_filefunc64_32_def* p_filefunc64_32,const zlib_filefunc_def* p_filefunc32);
 
 #define ZOPEN64(filefunc,filename,mode)         (call_zopen64((&(filefunc)),(filename),(mode)))
 #define ZTELL64(filefunc,filestream)            (call_ztell64((&(filefunc)),(filestream)))
 #define ZSEEK64(filefunc,filestream,pos,mode)   (call_zseek64((&(filefunc)),(filestream),(pos),(mode)))
 
+// Google
+void fill_fdopen_filefunc OF((zlib_filefunc_def* pzlib_filefunc_def, int fd));
+
 #ifdef __cplusplus
 }
 #endif
 
 #endif