Update zlib to 1.2.12

libs/zlib-1.2.12/contrib/README.contrib

@@ -8,14 +8,6 @@ ada/        by Dmitriy Anisimkov <anisimkov@yahoo.com>
         Support for Ada
         See http://zlib-ada.sourceforge.net/
 
-amd64/      by Mikhail Teterin <mi@ALDAN.algebra.com>
-        asm code for AMD64
-        See patch at http://www.freebsd.org/cgi/query-pr.cgi?pr=bin/96393
-
-asm686/     by Brian Raiter <breadbox@muppetlabs.com>
-        asm code for Pentium and PPro/PII, using the AT&T (GNU as) syntax
-        See http://www.muppetlabs.com/~breadbox/software/assembly.html
-
 blast/      by Mark Adler <madler@alumni.caltech.edu>
         Decompressor for output of PKWare Data Compression Library (DCL)
 
@@ -32,9 +24,6 @@ gcc_gvmat64/by Gilles Vollant <info@winimage.com>
 infback9/   by Mark Adler <madler@alumni.caltech.edu>
         Unsupported diffs to infback to decode the deflate64 format
 
-inflate86/  by Chris Anderson <christop@charm.net>
-        Tuned x86 gcc asm code to replace inflate_fast()
-
 iostream/   by Kevin Ruland <kevin@rodin.wustl.edu>
         A C++ I/O streams interface to the zlib gz* functions
 
@@ -45,16 +34,6 @@ iostream3/  by Ludwig Schwardt <schwardt@sun.ac.za>
             and Kevin Ruland <kevin@rodin.wustl.edu>
         Yet another C++ I/O streams interface
 
-masmx64/    by Gilles Vollant <info@winimage.com>
-        x86 64-bit (AMD64 and Intel EM64t) code for x64 assembler to
-        replace longest_match() and inflate_fast(),  also masm x86
-        64-bits translation of Chris Anderson inflate_fast()
-
-masmx86/    by Gilles Vollant <info@winimage.com>
-        x86 asm code to replace longest_match() and inflate_fast(),
-        for Visual C++ and MASM (32 bits).
-        Based on Brian Raiter (asm686) and Chris Anderson (inflate86)
-
 minizip/    by Gilles Vollant <info@winimage.com>
         Mini zip and unzip based on zlib
         Includes Zip64 support by Mathias Svensson <mathias@result42.com>