Merge topic 'dankm/tcsuffix'

6a82852dc2 Allow toolchain suffix without leading dash

Acked-by: Kitware Robot <kwrobot@kitware.com>
Acked-by: buildbot <buildbot@kitware.com>
Reviewed-by: Ben Boeckel <ben.boeckel@kitware.com>
Merge-request: !8462