[GR-20709] Requiring 'rubygems' should be done with #gem_original_require

* Otherwise it can lead to infinite recursion if the home or $LOAD_PATH
  are not properly set.

(cherry picked from commit 8d0b3e4)

Author: eregon

lib/truffle/truffle/lazy-rubygems.rb

@@ -19,7 +19,7 @@ module Kernel
         begin
           gem_original_require(path)
         rescue LoadError
-          require 'rubygems'
+          gem_original_require 'rubygems'
           require path
         end
       end