gnu: emacs-emms-print-metadata: Fix build.

This package is failing to build, with:

    ld: cannot find -lz: No such file or directory

...because `taglib-config --cflags --libs' is included in the gcc arguments,
and includes "-lz".  Since zlib isn’t in the inputs, it can’t be found, and
the build fails.  Adding it to the package inputs allows the build to succeed.

Re #5592.

* gnu/packages/emacs-xyz.scm (emacs-emms-print-metadata): Add zlib to inputs.

Change-Id: I07eaf91e3891f2d0da9f4d0acd166535fb8b58ab

gnu/packages/emacs-xyz.scm

@@ -5013,7 +5013,7 @@ podcasts) in Emacs.")
               (install-file "emms-print-metadata.1"
                             (string-append #$output "/share/man/man1")))))))
     (inputs
-     (list taglib))
+     (list taglib zlib))
     (home-page "https://www.gnu.org/software/emms/")
     (synopsis "The Emacs Multimedia System")
     (description

gnu/services/xorg.scm

@@ -44,7 +44,6 @@
   #:use-module (gnu system privilege)
   #:use-module (gnu services base)
   #:use-module (gnu services dbus)
-  #:use-module (gnu services desktop)
   #:use-module (gnu packages base)
   #:use-module (gnu packages guile)
   #:use-module (gnu packages xorg)