[yelp-xsl] configure.ac: gawk ironically broke compatibility with -W compat

[Shaun McCance <shaunm src gnome org>]

commit c1ba035473f4b21bb2bd8f3fa6d1707160b76825
Author: Shaun McCance <shaunm gnome org>
Date:   Tue Jun 9 17:27:52 2015 -0400

    configure.ac: gawk ironically broke compatibility with -W compat

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index eb2039b..a7f4868 100644
--- a/configure.ac
+++ b/configure.ac
@@ -11,7 +11,7 @@ dnl  bug reports after busted tarballs were shipped, we use -W compat
 dnl  whenever our awk is gawk.
 AC_PROG_AWK
 if test x$AWK = xgawk; then
-   YELP_XSL_AWK='gawk -W compat';
+   YELP_XSL_AWK='gawk --traditional';
 else
    YELP_XSL_AWK=$AWK;
 fi