[mutter] build: link against libinput explicitly

[Giovanni Campagna <gcampagna src gnome org>]

commit 7b3922f8e97168d250c52f7c9541f0d9ad63a2e3
Author: Giovanni Campagna <gcampagna src gnome org>
Date:   Mon Jun 16 23:22:38 2014 +0200

    build: link against libinput explicitly
    
    We use its symbol, we should link against it - or strict linkers
    like gold complain.

 configure.ac |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 4f8f3e5..a21b442 100644
--- a/configure.ac
+++ b/configure.ac
@@ -83,6 +83,7 @@ MUTTER_PC_MODULES="
    clutter-wayland-compositor-1.0
    clutter-egl-1.0
    cogl-1.0 >= 1.17.1
+   libinput
    wayland-server >= 1.4.93
    upower-glib >= 0.99.0
    gnome-desktop-3.0