control: manager: Avoid the need for fconcepts

Use of auto in a function parameter list is supported in c++17 but
gcc8 requires enabling concepts TS support.  We don't require a
template anyway - just be explicit here and avoid the need for
-fconcepts until such a time that other concepts TS features are
required.

Change-Id: Iec6205a2e4da41aeb5840dd9942778ba0f373842
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
1 file changed