configure.ac: Change bugs.freedesktop.org product to Wayland

Update the bug link. Thanks to Rune K. Svendsen for spotting this.

https://bugs.freedesktop.org/show_bug.cgi?id=60818

configure.ac

@@ -1,7 +1,7 @@
 AC_PREREQ([2.64])
 AC_INIT([weston],
         [1.0.90],
-        [https://bugs.freedesktop.org/enter_bug.cgi?product=weston],
+        [https://bugs.freedesktop.org/enter_bug.cgi?product=Wayland&component=weston],
         [weston],
         [http://wayland.freedesktop.org/])