[libxml2] Add autogen.sh to distrib

[Daniel Veillard <veillard src gnome org>]

commit 0f84ee239f2fb076231386f1d1ce8dec541df28e
Author: orzen <hansson mattias gmail com>
Date:   Tue Feb 9 17:55:40 2016 +0100

    Add autogen.sh to distrib
    
    For https://bugzilla.gnome.org/show_bug.cgi?id=761782
    
    autogen.sh was not included in the tarball releases which complicates
    situations when users have to make changes to e.g. configure.ac andi
    have to re-generate configure.

 Makefile.am |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/Makefile.am b/Makefile.am
index 70720f3..cbee997 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1207,7 +1207,7 @@ EXTRA_DIST = xml2-config.in xml2Conf.sh.in libxml.spec.in libxml2.spec \
             check-xsddata-test-suite.py check-xinclude-test-suite.py \
              example/Makefile.am example/gjobread.c example/gjobs.xml \
             $(man_MANS) libxml-2.0.pc.in libxml-2.0-uninstalled.pc.in \
-            libxml2-config.cmake.in \
+            libxml2-config.cmake.in autogen.sh \
             trionan.c trionan.h triostr.c triostr.h trio.c trio.h \
             triop.h triodef.h libxml.h elfgcchack.h xzlib.h buf.h \
             enc.h save.h testThreadsWin32.c genUnicode.py TODO_SCHEMAS \