[libxml2] Adding README.zOS to list of extra files for the release

[Daniel Veillard <veillard src gnome org>]

commit 56ec9cef9ef19e6eba64842279c1566699ff8b15
Author: Daniel Veillard <veillard redhat com>
Date:   Mon Aug 28 20:15:38 2017 +0200

    Adding README.zOS to list of extra files for the release

 Makefile.am |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/Makefile.am b/Makefile.am
index efc9212..748dfc2 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1256,6 +1256,7 @@ EXTRA_DIST = xml2-config.in xml2Conf.sh.in libxml.spec.in libxml2.spec \
             enc.h save.h testThreadsWin32.c genUnicode.py TODO_SCHEMAS \
             dbgen.pl dbgenattr.pl regressions.py regressions.xml \
             README.tests Makefile.tests libxml2.syms timsort.h \
+            README.zOS \
             $(CVS_EXTRA_DIST)