gnu: Remove unused lambda arguments and prefer separate phases over

augmented phases.

* gnu/packages/compression.scm (sharutils) [arguments]: Remove unused
  lambda args.
* gnu/packages/gl.scm (mesa) [arguments]: Same
* gnu/packages/fltk.scm [arguments]: Same.  Substitute const check
  phase with #:tests? #f.  Add pre-configure phase.
* gnu/packages/ghostscript.scm (ghostscript) [arguments]: Put makefile
  patches in separate phase.  Put so steps oinseparate phases.
* gnu/packages/glib.scm (gobject-introspection) [arguments]: Remove
  unused lambda args.  Put patches in pre-configure phase.
* gnu/packages/gnupg.scm (gnupg) [arguments]: Put patch in
  pre-configure phase.
  (pius) [arguments]: Delete const #t configure and build phases.
  (signing-party) [arguments]: Factor patches into post-unpack phase.
  (paperkey) [arguments]: Remove unused lambda args.  Factor out
  patches into pre-check phase.
* gnu/packages/icu4c.scm [arguments]: Change source dir after standard
  unpack phase.  Factor configure patches into pre-configure phase.
* gnu/packages/lsof.scm [arguments]: Remove unused lambda args.
  Remove unnecessary apply.
* gnu/packages/lvm.scm (lvm2) [arguments]: Factor out patches into
  pre-configure phase.
* gnu/packages/libtiff.scm [arguments]: Same
* gnu/packages/maths.scm (hdf5) [arguments]: Same
* gnu/packages/gtk.scm (gtk+-2) [arguments]: Same
* gnu/packages/mp3.scm (libmad) [arguments]: Same
  (id3lib) [arguments]: Same
* gnu/packages/python.scm (python-2) [arguments]: Same
* gnu/packages/texlive.scm (texlive) [arguments]: Same
* gnu/packages/pretty-print.scm (a2ps) [arguments]: Same
  (trueprint) [arguments]: Same
  (source-highlight) [arguments]: Same.  Remove unused lambda args.
* gnu/packages/netpbm.scm [arguments]: Remove unused lambda args.
  Factor out test patches into pre-check phase.  Condense calls to
  substitute*
* gnu/packages/openldap.scm [arguments]: Factor out libtool copy into
  post-configure phases. [synopsis] Remove package name.
* gnu/packages/ssh.scm (openssh) [arguments]: Factor out patches into
  separate phases.
* gnu/packages/tcsh.scm [arguments]: Factor out test patches into
  pre-check phase.
* gnu/packages/version-control.scm (git) [arguments]: Factor out
  patches into post-configure phase.
* gnu/packages/vim.scm [arguments]: Same. [synopsis] Remove package
  name.
* gnu/packages/vpn.scm (openconnect) [arguments]: Put configure flags
  in #:configure-flags

gnu/packages/fltk.scm

@@ -40,19 +40,14 @@
       `(("libx11" ,libx11)
         ("mesa" ,mesa)))
     (arguments
-     `(#:phases
-       (alist-replace
-        'check
-        (lambda* (#:key inputs #:allow-other-keys) #t) ;; fltk does not have a
-                                                       ;; check target
-        (alist-replace
-         'configure
-         (lambda* (#:key outputs #:allow-other-keys #:rest args)
-           (let ((configure (assoc-ref %standard-phases 'configure)))
-             (substitute* "makeinclude.in"
-               (("/bin/sh") (which "sh")))
-             (apply configure args)))
-         %standard-phases))))
+     `(#:tests? #f                      ;TODO: compile programs in "test" dir
+       #:phases
+       (alist-cons-before
+        'configure 'patch-makeinclude
+        (lambda _
+          (substitute* "makeinclude.in"
+            (("/bin/sh") (which "sh"))))
+        %standard-phases)))
     (home-page "https://www.fltk.org")
     (synopsis "3D C++ GUI library")
     (description "FLTK is a C++ GUI toolkit providing modern GUI functionality without the