[yelp] Bump yelp-xsl dependency to 3.27.1

[Shaun McCance <shaunm src gnome org>]

commit 1b79e26b9ef5ae17a25f1434ff5155f663bdc13c
Author: Shaun McCance <shaunm gnome org>
Date:   Mon Oct 16 11:43:13 2017 -0400

    Bump yelp-xsl dependency to 3.27.1

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 28478f8..405aff4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -34,7 +34,7 @@ PKG_CHECK_MODULES(YELP,
        libexslt >= 0.8.1
        sqlite3
        webkit2gtk-4.0 >= 2.15.1
-       yelp-xsl >= 3.12.0
+       yelp-xsl >= 3.27.1
 ])
 AC_SUBST([YELP_CFLAGS])
 AC_SUBST([YELP_LIBS])