New issue by lfdebrux on void-packages repository

https://github.com/void-linux/void-packages/issues/37512

Description:
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### System

* xuname: Void 5.15.41_1 x86_64-musl GenuineIntel notuptodate rFFFF

* package:  mdocml-1.14.6_3

### Expected behavior

`man` uses `less` as the default pager.

### Actual behavior

`man` uses `more` as the default pager.

### Steps to reproduce the behavior

- check out latest version of void-packages repo
- crossbuild mdocml (for instance with `./xbps-src -a armv5tel-musl pkg mdocml`
- install mdocml on target device
- open a man page (for instance `man man`)

### Notes

I think this happens because although less is a build dependency of mdocml, the configure script for mandoc tries to run less to check whether it is present, but the cross version gets installed in `usr/arm-linux-musleabi/bin`, which isn't in PATH (and probably wouldn't run anyway being a non-native binary).

I'm not sure of the right way to fix this, setting `BINM_PAGER` in `configure.local` would probably do the job, but maybe there is a more standard way of fixing this sort of problem?