gnu: Add texlive-isodate.

* gnu/packages/tex.scm (texlive-isodate): New variable.

gnu: Add texlive-cleveref.

* gnu/packages/tex.scm (texlive-cleveref): New variable.

gnu: Add texlive-glossaries.

* gnu/packages/tex.scm (texlive-glossaries): New variable.

gnu: Add texlive-tocbibind.

* gnu/packages/tex.scm (texlive-tocbibind): New variable.

gnu: Add texlive-morewrites.

* gnu/packages/tex.scm (texlive-morewrites): New variable.

gnu: Add texlive-accsupp.

* gnu/packages/tex.scm (texlive-accsupp): New variable.

gnu: Add texlive-mparhack.

* gnu/packages/tex.scm (texlive-mparhack): New variable.

gnu: Add texlive-fixfoot.

* gnu/packages/tex.scm (texlive-fixfoot): New variable.

gnu: Add texlive-denisbdoc.

* gnu/packages/tex.scm (texlive-denisbdoc): New variable.

gnu: Add texlive-york-thesis.

* gnu/packages/tex.scm (texlive-york-thesis): New variable.

gnu: Add texlive-yb-book.

* gnu/packages/tex.scm (texlive-yb-book): New variable.

gnu: Add texlive-imakeidx.

* gnu/packages/tex.scm (texlive-imakeidx): New variable.

gnu: Add texlive-yazd-thesis.

* gnu/packages/tex.scm (texlive-yazd-thesis): New variable.

gnu: Add texlive-xmuthesis.

* gnu/packages/tex.scm (texlive-xmuthesis): New variable.

gnu: Add texlive-xduts.

* gnu/packages/tex.scm (texlive-xduts): New variable.

gnu: Add texlive-xduthesis.

* gnu/packages/tex.scm (texlive-xduthesis): New variable.

gnu: Add texlive-wsemclassic.

* gnu/packages/tex.scm (texlive-wsemclassic): New variable.

gnu: Add texlive-vancouver.

* gnu/packages/tex.scm (texlive-vancouver): New variable.

gnu: Add texlive-uwthesis.

* gnu/packages/tex.scm (texlive-uwthesis): New variable.

gnu: Add texlive-uwa-pif.

* gnu/packages/tex.scm (texlive-uwa-pif): New variable.