keg_relocate: also relocate executable text files.

There are times (e.g. `ocaml`) when the `text_executable?` test will
match even although `file` does not consider it a text file. Ensure
that it's relocated in this case correctly.

References Homebrew/homebrew#41663.
Closes Homebrew/homebrew#41926.

Library/Homebrew/keg_relocate.rb

@@ -163,7 +163,10 @@ class Keg
     path.find do |pn|
       next if pn.symlink? or pn.directory?
       next if Metafiles::EXTENSIONS.include? pn.extname
-      text_files << pn if Utils.popen_read("/usr/bin/file", "--brief", pn).include?("text")
+      if Utils.popen_read("/usr/bin/file", "--brief", pn).include?("text") ||
+            pn.text_executable?
+        text_files << pn
+      end
     end
 
     text_files