[tex-hyphen] Add \{left,right}hyphenmin info to pattern files

[Arthur Reutenauer]

> If you send me a template, sure.

  See the files in hyph-utf8/tex/generic/hyph-utf8/patterns/tex in
branch yaml-headers in the repository, or

	https://github.com/hyphenation/tex-hyphen/tree/yaml-headers/hyph-utf8/tex/generic/hyph-utf8/patterns/tex

in GitHub’s web interface.

	Best,

		Arthur