Add support for OpenMandriva

[AngryPenguinPL]

Hi. Can you add Linux OpenMandriva to screenFetch?

New distro request

Distro name: OpenMandriva
Homepage: https://www.openmandriva.org/
Distro logo:
1. logo https://gallery.openmandriva.org/upload/2013/08/21/20130821232618-e463453c.png
2. logo with name https://gallery.openmandriva.org/_data/i/upload/2013/08/21/20130821233039-483b50e6-me.png
Package manager: RPM5 and URPMI for latest stable OpenMandriva Lx 3, 
upcoming Openmandriva Lx 4 use RPM4 and DNF.

Show us the output of
for OpenMandriva Lx 3

 => lsb_release -sirc
OpenMandrivaLinux 3.0 Einsteinium

 => cat /etc/os-release
NAME="OpenMandriva Lx"
VERSION="3.0 (Einsteinium)"
ID="openmandriva"
VERSION_ID="3.0"
BUILD_ID="20171117.19"
PRETTY_NAME="OpenMandriva Lx 3.0 (Einsteinium)"
ANSI_COLOR="1;43"
CPE_NAME="cpe:/o:openmandriva:openmandriva_lx:3.0"
HOME_URL="http://www.openmandriva.org"
BUG_REPORT_URL="https://issues.openmandriva.org

 => ls -1 /etc/*-release
/etc/lsb-release
/etc/mandrakelinux-release
/etc/mandrake-release
/etc/mandriva-release
/etc/openmandriva-release
/etc/os-release
/etc/redhat-release
/etc/rosa-release
etc/system-release