use /usr/bin/ instead of /bin/ as the target paths for binaries

nl6720requested to merge
nl6720/mkinitcpio-archiso:binary-paths into master

  • hooks/*: use full path to ash in the shebang

    /bin is a symlink to /usr/bin and it is not in PATH, so it is better to reference the "real" location of "ash".

  • install/archiso_pxe_{common,nfs}: use /usr/bin/ instead of /bin/ as the target paths for binaries

    While "$BUILDROOT/bin" is a symlink to "$BUILDROOT/usr/bin", let's not rely on the symlink. Especially since /bin is not in the initramfs' PATH.

Edited by nl6720

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