format-code: run all linters before exit

Rather than stop on the first linter that fails, run them all and
collect the results.  Show a summary of all the failing linters
at the end.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I6cb7d67c72025ed9e755c35b64bd43a82f066309
1 file changed