sci-libs/cantera: 2.4.0-r1. Fix 'fatal' warning
The SConstruct script contains block that tries to evaluate
'git rev-parse --short HEAD` comand and returns the
"fatal: not a git repository (or any parent up to mount point /var/tmp)"
warning from git command itself if git is installed in system.
It occurs because the release package archive doesn't contain ".git" directory.
This behaviour doesn't affect emerge process but can confuse
in the case of other issues.
Closes: https://bugs.gentoo.org/689998
Signed-off-by: Sergey Torokhov <torokhov_s_a@mail.ru>
Signed-off-by: Michał Górny <mgorny@gentoo.org>