[libxml2] Add xz to xml2-config --libs output

[Daniel Veillard <veillard src gnome org>]

commit 2e354d7432dd4fd946328c242ff5289d9bfb3ce9
Author: Baruch Siach <baruch tkos co il>
Date:   Thu Apr 28 15:09:25 2016 +0800

    Add xz to xml2-config --libs output
    
    XML_LIBS should include LZMA_LIBS. This ensures that 'xml2-config --libs'
    shows -llzma when xz is enabled. Otherwise static link fails because of
    missing xz symbols.

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index fd05c56..352da48 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1526,7 +1526,7 @@ else
                 LDFLAGS="${_ldflags}"])]))
     fi
 fi
-XML_LIBS="-lxml2 $Z_LIBS $THREAD_LIBS $ICONV_LIBS $ICU_LIBS $M_LIBS $LIBS"
+XML_LIBS="-lxml2 $Z_LIBS $LZMA_LIBS $THREAD_LIBS $ICONV_LIBS $ICU_LIBS $M_LIBS $LIBS"
 XML_LIBTOOLLIBS="libxml2.la"
 AC_SUBST(WITH_ICU)