New comment by sgn on void-packages repository

https://github.com/void-linux/void-packages/pull/28287#issuecomment-769507265

Comment:
Waiting confirmation from https://bugzilla.mozilla.org/show_bug.cgi?id=1689508

Note that Mozilla staff usually build with gyp and their comments in `all.sh` indicates that `chain.sh` is usually not run when built by gyp.