[tlbuild] Broken TL build

[Mojca Miklavec]

On Mon, 17 Jan 2022 at 23:42, Karl Berry wrote:
>
>     changing pow(10, exponent) into pow(10.0, exponent) helps.
>
> Sounds sensible. Committed, r61640. We'll see. If it works, possibly
> also worth a report to ICU, if you have the energy ...

https://unicode-org.atlassian.net/browse/ICU-21896
https://github.com/unicode-org/icu/pull/1961

It compiles for me in isolation at least (icu only, no TeX Live yet).

I also opened one from the issues we reported years ago once I got
reminded by the list of files in TL patches:
    https://github.com/unicode-org/icu/pull/1960
Let's see what happens.

It looks like patch-10-ES is no longer needed since 68.1:
    https://github.com/unicode-org/icu/pull/1396
patch-14-xopen could be linked with
    https://unicode-org.atlassian.net/browse/ICU-12629
We could probably drop patch-20-private now that 32-bit macOS binaries
are no longer compiled.
Not sure if patch-19-netbsd is still needed (it looks old).

Mojca