Add $X_LIBS path while searching for libfreetype.

diff --git a/configure b/configure
index 75249b4..3fffe36 100755
--- a/configure
+++ b/configure
@@ -4532,7 +4532,7 @@
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   ac_save_LIBS="$LIBS"
-LIBS="-lfreetype  $LIBS"
+LIBS="-lfreetype $X_LIBS $LIBS"
 cat > conftest.$ac_ext <<EOF
 #line 4538 "configure"
 #include "confdefs.h"