Don't create tags for .xz files

support-files/build-tags

@@ -8,7 +8,7 @@ then
   echo client storage dbug libmysql sql-common \
        sql extra mysys mysys_ssl strings regex pcre vio include \
        tools unittest plugin libmysqld | \
-       xargs -n1 git ls-files | grep -v '\.jar$' | \
+       xargs -n1 git ls-files | grep -v '\.jar$' | grep -v '\.xz$' | \
        xargs etags -o TAGS --append
 else
   find . -type f ! -name "*.jar" |