janitorial: log2asc: properly close infile and outfile

Signed-off-by: Robert Schwebel <r.schwebel@pengutronix.de>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

log2asc.c

@@ -198,6 +198,8 @@ int main(int argc, char **argv)
 		}
 	}
 	fflush(outfile);
+	fclose(outfile);
+	fclose(infile);
 
 	return 0;
 }