Path variable updates:

Path variable updates:
  * add base_prefix, base_bindir, base_libdir, and base_sbindir, for paths
    that are always rooted at / (for things like /sbin/ldconfig).
  * Rearrange the path bits in bitbake.conf to be a bit more comprehensible.
  * Override more path variables in cross.bbclass and native.bbclass, so that
    they can safely be overridden by the user.

BKrev: 420c0550HAHmBzqBNAmgZogIut9Srg