sys-libs/zlib: Sync with Gentoo

It's from Gentoo commit 31b2c136145e3fbb9ccbbf461c7e74e16ad02d32.

sdk_container/src/third_party/portage-stable/sys-libs/zlib/files/zlib-1.2.11-fix-deflateParams-usage.patch

@@ -1,69 +0,0 @@
-https://github.com/madler/zlib/commit/f9694097dd69354b03cb8af959094c7f260db0a1
-
-From f9694097dd69354b03cb8af959094c7f260db0a1 Mon Sep 17 00:00:00 2001
-From: Mark Adler <madler@alumni.caltech.edu>
-Date: Mon, 16 Jan 2017 09:49:35 -0800
-Subject: [PATCH] Permit a deflateParams() parameter change as soon as
- possible.
-
-This commit allows a parameter change even if the input data has
-not all been compressed and copied to the application output
-buffer, so long as all of the input data has been compressed to
-the internal pending output buffer. This also allows an immediate
-deflateParams change so long as there have been no deflate calls
-since initialization or reset.
----
- deflate.c |  6 +++---
- zlib.h    | 11 ++++++-----
- 2 files changed, 9 insertions(+), 8 deletions(-)
-
-diff --git a/deflate.c b/deflate.c
-index b63311a5..20bda4f6 100644
---- a/deflate.c
-+++ b/deflate.c
-@@ -494,7 +494,7 @@ int ZEXPORT deflateResetKeep (strm)
-         s->wrap == 2 ? crc32(0L, Z_NULL, 0) :
- #endif
-         adler32(0L, Z_NULL, 0);
--    s->last_flush = Z_NO_FLUSH;
-+    s->last_flush = -2;
- 
-     _tr_init(s);
- 
-@@ -587,12 +587,12 @@ int ZEXPORT deflateParams(strm, level, strategy)
-     func = configuration_table[s->level].func;
- 
-     if ((strategy != s->strategy || func != configuration_table[level].func) &&
--        s->high_water) {
-+        s->last_flush != -2) {
-         /* Flush the last buffer: */
-         int err = deflate(strm, Z_BLOCK);
-         if (err == Z_STREAM_ERROR)
-             return err;
--        if (strm->avail_out == 0)
-+        if (strm->avail_in || (s->strstart - s->block_start) + s->lookahead)
-             return Z_BUF_ERROR;
-     }
-     if (s->level != level) {
-diff --git a/zlib.h b/zlib.h
-index 5daf4f28..577d81e3 100644
---- a/zlib.h
-+++ b/zlib.h
-@@ -712,11 +712,12 @@ ZEXTERN int ZEXPORT deflateParams OF((z_streamp strm,
-    used to switch between compression and straight copy of the input data, or
-    to switch to a different kind of input data requiring a different strategy.
-    If the compression approach (which is a function of the level) or the
--   strategy is changed, and if any input has been consumed in a previous
--   deflate() call, then the input available so far is compressed with the old
--   level and strategy using deflate(strm, Z_BLOCK).  There are three approaches
--   for the compression levels 0, 1..3, and 4..9 respectively.  The new level
--   and strategy will take effect at the next call of deflate().
-+   strategy is changed, and if there have been any deflate() calls since the
-+   state was initialized or reset, then the input available so far is
-+   compressed with the old level and strategy using deflate(strm, Z_BLOCK).
-+   There are three approaches for the compression levels 0, 1..3, and 4..9
-+   respectively.  The new level and strategy will take effect at the next call
-+   of deflate().
- 
-      If a deflate(strm, Z_BLOCK) is performed by deflateParams(), and it does
-    not have enough output space to complete, then the parameter change will not