gnu: libwacom: Update to 1.4.

* gnu/packages/xdisorg.scm (libwacom): Update to 1.4.

gnu/packages/xdisorg.scm

@@ -1080,7 +1080,7 @@ Escape key when Left Control is pressed and released on its own.")
 (define-public libwacom
   (package
     (name "libwacom")
-    (version "1.3")
+    (version "1.4")
     (source (origin
               (method url-fetch)
               (uri (string-append
@@ -1088,7 +1088,7 @@ Escape key when Left Control is pressed and released on its own.")
                     "libwacom-" version "/libwacom-" version ".tar.bz2"))
               (sha256
                (base32
-                "0g48cdg2qpvrr2nk8ccibjg3iv7iqskdv66izxacqx70w47y1771"))))
+                "1rk661cymmahak9rw0wcssnfszbngq74vp7zc2cwyg6yrjbif1lh"))))
     (build-system glib-or-gtk-build-system)
     (arguments
      `(#:configure-flags '("--disable-static")))