New review comment by pullmoll on void-packages repository

https://github.com/void-linux/void-packages/pull/27145#discussion_r543623335

Comment:
FWIW if you want to copy a tree w/o rsync you can achieve similar results with `find` and a `{bsd,}tar` pipe like:
```
find usr/include -iname "*.h" | tar cf - -T - | tar xpf - -C $(INSTALL_HDR_PATH)
```
This is untested and may need `find -print0` and `tar --null` in case of blanks in path or filenames.