New comment by tornaria on void-packages repository

https://github.com/void-linux/void-packages/pull/36945#issuecomment-1114383815

Comment:
:facepalm: of course the answer is to use `${XBPS_CROSS_BASE}/usr/include/openblas` instead, which will work on both cases.

I also simplified the template a little bit and avoid all the warnings from wrong `-I/usr/include` and `-L/usr/lib`.