[ruby] Update TODO about rubygems-filesystem.

[Vít Ondruch]

commit 0917ed3f905a48eae51b575c2a97b6553787cc03
Author: Vít Ondruch <vondruch at redhat.com>
Date:   Thu Sep 6 09:28:09 2012 +0200

    Update TODO about rubygems-filesystem.

 ruby.spec |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/ruby.spec b/ruby.spec
index 3e3449e..e2e87e5 100644
--- a/ruby.spec
+++ b/ruby.spec
@@ -41,7 +41,9 @@
 
 # Specify custom RubyGems root.
 %global gem_dir %{_datadir}/gems
-# TODO: Should we create arch specific rubygems-filesystem?
+# TODO: These folders should go into rubygem-filesystem but how to achieve it,
+# since noarch package cannot provide arch dependent subpackages?
+# http://rpm.org/ticket/78
 %global gem_extdir %{_exec_prefix}/lib{,64}/gems
 
 %global rake_version 0.9.2.2