gnu: Replace uses of texlive-*-amsfonts.

gnu: Replace uses of texlive-*-amsfonts.

* gnu/packages/algebra.scm (pari-gp)[native-inputs]: Replace
texlive-fonts-amsfonts and texlive-latex-amsfonts with texlive-amsfonts in
texlive-union.
* gnu/packages/docbook.scm (dblatex)[inputs]: Same.
* gnu/packages/plotutils.scm (asymptote)[native-inputs]: Same.
* gnu/packages/python-xyz.scm (python-numpy-documentation,
python-matplotlib-documentation, python-ipython-documentation)
[native-inputs]: Same.
* gnu/packages/statistics.scm (r-with-tests)[native-inputs]: Same.
* gnu/packages/tex.scm (teximpatient)[native-inputs]: Same.