scripts: genksyms: fix resource leak

This commit fixed resource leak at func main

Signed-off-by: Maxim Zhukov <[e-mail]>
Signed-off-by: Michal Marek <[e-mail]>

scripts/genksyms/genksyms.c

···
 			(double)nsyms / (double)HASH_BUCKETS);
 	}
 
+	if (dumpfile)
+		fclose(dumpfile);
+
 	return errors != 0;
 }