[libxslt] Fix xml2-config check in configure script

[Nick Wellnhofer <nwellnhof src gnome org>]

commit 90c34c8bb90e095a8a8fe8b2ce368bd9ff1837cc
Author: Nick Wellnhofer <wellnhofer aevum de>
Date:   Fri Nov 15 11:53:11 2019 +0100

    Fix xml2-config check in configure script
    
    A 'print' option has never been supported. After a recent change to
    libxml2, invalid options cause xml2-config to fail.

 configure.ac | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/configure.ac b/configure.ac
index 3da57b18..585b9d7c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -548,7 +548,7 @@ dnl make sure xml2-config is executable,
 dnl test version and init our variables
 dnl
 
-if test "x$LIBXML_LIBS" = "x" && ${XML_CONFIG} --libs print > /dev/null 2>&1
+if test "x$LIBXML_LIBS" = "x" && ${XML_CONFIG} --libs > /dev/null 2>&1
 then
     AC_MSG_CHECKING(for libxml libraries >= $LIBXML_REQUIRED_VERSION)
     XMLVERS=`$XML_CONFIG --version`