keg_relocate: Check HOMEBREW_TEMP's realpath when excluding name changes.

Since /tmp (the default HOMEBREW_TEMP) is a symlink to /private/tmp,
some build systems (like Parrot's) will attempt to use the realpath
instead of the literal /tmp we supply it with. This breaks the relocation
code, which only tested the literal HOMEBREW_TEMP and not its realpath.

Library/Homebrew/extend/os/mac/keg_relocate.rb

@@ -6,7 +6,9 @@ class Keg
 
         each_install_name_for(file) do |bad_name|
           # Don't fix absolute paths unless they are rooted in the build directory
-          next if bad_name.start_with?("/") && !bad_name.start_with?(HOMEBREW_TEMP.to_s)
+          next if bad_name.start_with?("/") &&
+                  !bad_name.start_with?(HOMEBREW_TEMP.to_s) &&
+                  !bad_name.start_with?(HOMEBREW_TEMP.realpath.to_s)
 
           new_name = fixed_name(file, bad_name)
           change_install_name(bad_name, new_name, file) unless new_name == bad_name