gnu: texlive-latex-base: Simplify.

gnu: texlive-latex-base: Simplify.

* gnu/packages/tex.scm (texlive-latex-base)[source]: Use TEXLIVE-ORIGIN.
[arguments]: Simplify build phase by running fmtutil-sys; adjust install
phase.
[native-inputs]: Remove texlive-generic-unicode-data,
texlive-generic-dehyph-exptl, texlive-generic-tex-ini-files,
texlive-latex-latexconfig, texlive-generic-hyphen, texlive-generic-ruhyphen,
texlive-generic-ukrhyph, texlive-generic-config, and
texlive-latex-base-support-files; add texlive-tex-ini-files, texlive-kpathsea,
and texlive-luatexconfig.
[propagated-inputs]: Add texlive-etex, texlive-hyph-utf8, texlive-hyphen-base,
texlive-hyphen-afrikaans, texlive-hyphen-ancientgreek,
texlive-hyphen-armenian, texlive-hyphen-basque, texlive-hyphen-belarusian,
texlive-hyphen-bulgarian, texlive-hyphen-catalan, texlive-hyphen-chinese,
texlive-hyphen-churchslavonic, texlive-hyphen-coptic, texlive-hyphen-croatian,
texlive-hyphen-czech, texlive-hyphen-danish, texlive-hyphen-dutch,
texlive-hyphen-english, texlive-hyphen-esperanto, texlive-hyphen-estonian,
texlive-hyphen-ethiopic, texlive-hyphen-finnish, texlive-hyphen-french,
texlive-hyphen-friulan, texlive-hyphen-galician, texlive-hyphen-georgian,
texlive-hyphen-german, texlive-hyphen-greek, texlive-hyphen-hungarian,
texlive-hyphen-icelandic, texlive-hyphen-indic, texlive-hyphen-indonesian,
texlive-hyphen-interlingua, texlive-hyphen-irish, texlive-hyphen-italian,
texlive-hyphen-kurmanji, texlive-hyphen-latin, texlive-hyphen-latvian,
texlive-hyphen-lithuanian, texlive-hyphen-mongolian, texlive-hyphen-norwegian,
texlive-hyphen-occitan, texlive-hyphen-piedmontese, texlive-hyphen-polish,
texlive-hyphen-portuguese, texlive-hyphen-romanian, texlive-hyphen-romansh,
texlive-hyphen-russian, texlive-hyphen-sanskrit, texlive-hyphen-serbian,
texlive-hyphen-slovak, texlive-hyphen-slovenian, texlive-hyphen-spanish,
texlive-hyphen-swedish, texlive-hyphen-thai, texlive-hyphen-turkish,
texlive-hyphen-turkmen, texlive-hyphen-ukrainian, texlive-hyphen-uppersorbian,
texlive-hyphen-welsh, texlive-unicode-data, texlive-ukrhyph, texlive-ruhyphen,
and texlive-latexconfig.