New comment by q66 on void-packages repository

https://github.com/void-linux/void-packages/pull/23903#issuecomment-668968301

Comment:
yup - just tested with system libvpx: please

1) rebase
2) change `post_extract` to `post_patch` while at this
3) add `libvpx-devel` to `makedepends`, then add `libvpx` to `system`
4) the body of `post_extract` could use some cleaning - first apply the musl patches (change conditional to `if [ "$XBPS_TARGET_LIBC" = "musl" ]`), then apply i686 patches separately (change the case to `i686*` from `i686`)