* configure.in (POSTLINK): sign built program using RUBY_CODESIGN
  identity.
  [Backport #9491]

* Makefile.in (PROGRAM): ditto.

* Makefile.in (LIBRUBY_SO): ditto.

* lib/mkmf.rb (LINK_SO): sign extensions too.  replace empty line with
  default command.

* enc/depend (link_so): prefix $(Q) for each commands.

* tool/mkconfig.rb: restore embedded newlines.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_3@44860 b2dd03c8-39d4-4d8f-98ff-823fe69b080e