; Fix typos

exec/exec1.c

@@ -53,7 +53,7 @@ main (int argc, char **argv)
 
       tracing_execve (argv[2], argv + 2, environ);
 
-      /* An error occured.  Exit with failure.  */
+      /* An error occurred.  Exit with failure.  */
       exit (127);
     }
   else

exec/trace.c

@@ -1028,7 +1028,7 @@ process_system_call (struct exec_tracee *tracee)
 	  break;
 
 	case 1:
-	  /* An error has occured; errno is set to the error.  */
+	  /* An error has occurred; errno is set to the error.  */
 	  goto report_syscall_error;
 	}