CLI: infer --name based on first C source file or object

Previously, --name would only be inferred if there was exactly 1 C
source file or exactly 1 object. Now it will be inferred if there is at
least one of either.
cb896a6573Andrew Kelley committed on 12/10/2020, 4:20:13 AMparent4c51ade
1 file changedLine totals unavailable