use /bin/mail instead of /bin/mailx

/bin/mail is a symlink to /bin/mailx on Fedora and /usr/bin/mailx on openSUSE
but openSUSE misses /bin/mailx

Related #181

Signed-off-by: Jakub Filak <jfilak@redhat.com>
add openSUSE workflows

Related to #181

Signed-off-by: Jakub Filak <jfilak@redhat.com>
introduce new package libreport-opensuse

The package contains openSUSE workflow definitions

Related to #181

Signed-off-by: Jakub Filak <jfilak@redhat.com>