bug#58509: 29.0.50; Synchronous nativecomp

[Lars Ingebrigtsen]

Eli Zaretskii <eliz@gnu.org> writes:

>> However, this also almost requires that we allow the nativecomp to
>> happen synchronously -- the batch job may end before nativecomp finished
>> otherwise, leading to cleanup problems and loss of efficiency.
>
> The above-mentioned functions do work synchronously.

`batch-native-compile' just calls `byte-compile-file' on the command
line arguments.  That's not what's needed here at all.