Fix exiftool. Fixes Homebrew/homebrew#1283.

Formula/exiftool.rb

@@ -14,6 +14,14 @@ class Exiftool <Formula
     
     # Link the executable script into "bin"
     bin.mkpath
-    ln_s libexec+"exiftool", bin
+    (bin + 'exiftool').write <<-EOBIN
+#!/bin/bash
+
+which_exiftool=`which $0`
+dirname_exiftool=$(dirname $which_exiftool)
+readlink_exiftool=$(readlink $which_exiftool)
+dirname_unlinked_exiftool=$(dirname $dirname_exiftool/$readlink_exiftool)
+$dirname_unlinked_exiftool/../libexec/exiftool "$@"
+EOBIN
   end
 end