gnu: gettext: Rename binding to 'gnu-gettext'.

* gnu/packages/gettext.scm (gettext): Rename to...
  (gnu-gettext): ... this.  This is used to work around the circular
  dependency introduced in commit c42a4b7, which users with a #:renamer
  cannot cope with.
* gnu/packages/acl.scm, gnu/packages/attr.scm, gnu/packages/cdrom.scm,
  gnu/packages/fdisk.scm, gnu/packages/gkrellm.scm, gnu/packages/glib.scm,
  gnu/packages/gnunet.scm, gnu/packages/grub.scm, gnu/packages/linux.scm,
  gnu/packages/maths.scm, gnu/packages/nano.scm, gnu/packages/parted.scm,
  gnu/packages/system.scm, gnu/packages/version-control.scm,
  gnu/packages/vpn.scm, gnu/packages/w3m.scm, gnu/packages/wget.scm:
  Adjust accordingly.

gnu/packages/version-control.scm

@@ -26,8 +26,7 @@
   #:use-module (guix build-system gnu)
   #:use-module (guix build-system python)
   #:use-module (guix build utils)
-  #:use-module ((gnu packages gettext)
-                #:renamer (symbol-prefix-proc 'guix:))
+  #:use-module (gnu packages gettext)
   #:use-module (gnu packages apr)
   #:use-module (gnu packages curl)
   #:use-module (gnu packages nano)
@@ -58,7 +57,7 @@
     (inputs
      ;; Note: 'tools/packaging/lp-upload-release' and 'tools/weavemerge.sh'
      ;; require Zsh.
-     `(("gettext" ,guix:gettext)))
+     `(("gettext" ,gnu-gettext)))
     (arguments
      `(#:tests? #f ; no test target
        #:python ,python-2)) ; Python 3 apparently not yet supported, see
@@ -87,7 +86,7 @@ from a command line or use a GUI application.")
    (inputs
     `(("curl" ,curl)
       ("expat" ,expat)
-      ("gettext" ,guix:gettext)
+      ("gettext" ,gnu-gettext)
       ("openssl" ,openssl)
       ("perl" ,perl)
       ("python" ,python-2) ; CAVEAT: incompatible with python-3 according to INSTALL