[libxml2] Use XML_PRIVATE_LIBS in libxml2_la_LIBADD

[Nick Wellnhofer <nwellnhof src gnome org>]

commit a340d8b10ccea6dd9d474ce4070882254c0ad927
Author: Nick Wellnhofer <wellnhofer aevum de>
Date:   Sun Apr 3 02:20:04 2022 +0200

    Use XML_PRIVATE_LIBS in libxml2_la_LIBADD
    
    After this change, variables Z_LIBS, LZMA_LIBS, ICU_LIBS, ICONV_LIBS
    and WIN32_EXTRA_LIBADD are unused outside of configure.ac. We keep
    exporting them with AC_SUBST for now.

 Makefile.am | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/Makefile.am b/Makefile.am
index 453c8e49..71543e41 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -24,7 +24,7 @@ bin_SCRIPTS=xml2-config
 
 lib_LTLIBRARIES = libxml2.la
 libxml2_la_CFLAGS = $(EXTRA_CFLAGS) $(THREAD_CFLAGS) $(Z_CFLAGS) $(LZMA_CFLAGS)
-libxml2_la_LIBADD = $(ICU_LIBS) $(THREAD_LIBS) $(Z_LIBS) $(LZMA_LIBS) $(ICONV_LIBS) $(LIBM) 
$(WIN32_EXTRA_LIBADD)
+libxml2_la_LIBADD = $(XML_PRIVATE_LIBS)
 
 if USE_VERSION_SCRIPT
 LIBXML2_VERSION_SCRIPT = $(VERSION_SCRIPT_FLAGS)$(srcdir)/libxml2.syms