Martin Afanasjew f1a7e51d2a bin/brew: avoid unnecessary 'readlink' invocation
For typical installations where `brew` is not a symbolic link, this
reduces the number of processes that need to be spawned.

Closes Homebrew/homebrew#46269.

Signed-off-by: Martin Afanasjew <martin@afanasjew.de>
2015-12-01 21:36:05 +01:00
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