gnu: Deprecate `texlive-tiny'.

At this point, there are three equivalent TeX Live sub-systems:
texlive-scheme-basic, texlive-tiny, and (texlive-updmap.cfg).  It is confusing
to keep so many around.

* doc/contributing.texi (Submitting Patches): Remove reference to
TEXLIVE-TINY.
* gnu/packages/algebra.scm (pari-gp)[native-inputs]:
(giac)[native-inputs]:
* gnu/packages/chez.scm (chez-sockets)[native-inputs]:
* gnu/packages/engineering.scm (fastcap)[native-inputs]:
* gnu/packages/gettext.scm (po4a)[native-inputs]:
* gnu/packages/maths.scm (cddlib)[native-inputs]:
(gnuplot)[native-inputs]:
(itpp)[native-inputs]:
* gnu/packages/ocaml.scm (unison)[native-inputs]:
* gnu/packages/pdf.scm (extractpdfmark)[native-inputs]:
* gnu/packages/photo.scm (enblend-enfuse): Replace TEXLIVE-TINY with a call to TEXLIVE-UPDMAP.CFG.
* gnu/packages/radio.scm (gnuradio)[native-inputs]: Remove unnecessary
TEXLIVE-TINY.
* gnu/packages/tex.scm (texlive-tiny): Deprecate it in favor of TEXLIVE-SCHEME-BASIC.
(texlive-makecmds)[native-inputs]:  Replace TEXLIVE-TINY with a call to TEXLIVE-UPDMAP.CFG.
* guix/lint.scm (check-inputs-should-be-native): Check only for
"texlive-updmap.cfg" input name.

gnu/packages/algebra.scm

@@ -236,7 +236,7 @@ the real span of the lattice.")
                (base32
                 "03swii601kxnphl6v7wv0rh2xn4rz6xbljzvfw5v9py6w3z5nm63"))))
     (build-system gnu-build-system)
-    (native-inputs (list texlive-tiny))
+    (native-inputs (list (texlive-updmap.cfg)))
     (inputs (list gmp libx11 perl readline))
     (arguments
      '(#:make-flags '("all")
@@ -405,7 +405,7 @@ precision.")
            hevea
            python-wrapper
            readline
-           texlive-tiny))
+           (texlive-updmap.cfg)))
     (home-page "https://www-fourier.ujf-grenoble.fr/~parisse/giac.html")
     (synopsis "Computer algebra system")
     (description