parser/gotest: Don't ignore output when there were no tests

In some cases we may have captured some output for a package that didn't
have any tests. We should include it in the generated report as it may
contain useful information.

parser/gotest/report_builder.go

@@ -210,6 +210,8 @@ func (b *reportBuilder) CreatePackage(name, result string, duration time.Duratio
 				Name:   name,
 				Output: b.output.Get(globalID),
 			}
+		} else if b.output.Contains(globalID) {
+			pkg.Output = b.output.Get(globalID)
 		}
 		b.packages = append(b.packages, pkg)
 		b.output.Clear(globalID)