sci-libs/cantera: revision bump (r2) with fix python installation path

sci-libs/cantera: revision bump (r2) with fix python installation path

Fix python installation path using 'libdirname' env variable.
This patch is backport of upstream patch [1].

[1] https://github.com/Cantera/cantera/pull/674

This patch is backport of upstream patch [1] but with removing of
'setIterator' function instead of it's deprecation.

[1] https://github.com/Cantera/cantera/pull/672

Closes: https://github.com/gentoo/gentoo/pull/12701
Signed-off-by: Sergey Torokhov <torokhov_s_a@mail.ru>
Signed-off-by: Joonas Niilola <juippis@gentoo.org>