Also probe in canonicalized path, if binary was a symlink.
Also probe in canonicalized path, if binary was a symlink.

Signed-off-by: Edward Z. Yang <dbd597f5635f432486c5d365e9bb585b3eaa1853@cs.stanford.edu>

garetxe/cabal,kolmodin/cabal,mydaum/cabal,sopvop/cabal,kolmodin/cabal,edsko/cabal,Heather/cabal,bennofs/cabal,sopvop/cabal,randen/cabal,randen/cabal,gbaz/cabal,sopvop/cabal,gbaz/cabal,lukexi/cabal,themoritz/cabal,edsko/cabal,themoritz/cabal,martinvlk/cabal,martinvlk/cabal,mydaum/cabal,bennofs/cabal,lukexi/cabal,garetxe/cabal,Heather/cabal,headprogrammingczar/cabal,themoritz/cabal,thomie/cabal,headprogrammingczar/cabal,thomie/cabal