I'm assuming this doesn't have any meaningful effect, and it seems to reduce
the number of readlink calls by a lot.
* build-aux/build-self.scm (build-program): Set
%file-port-name-canonicalization to #f.
(build): Ditto.
* build-aux/compile-as-derivation.scm: Ditto.
Change-Id: If43415c46c3911e84c76d1a9828b9c417a140a1b