[ruby] Add reference to upstream ticket possibly removing one patch.

[Vít Ondruch]

commit 111d4ef777cc4646d10ae7d3773c81ba32220941
Author: Vít Ondruch <vondruch at redhat.com>
Date:   Thu Feb 21 15:52:32 2013 +0100

    Add reference to upstream ticket possibly removing one patch.

 ruby.spec |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/ruby.spec b/ruby.spec
index fc62915..415eee8 100644
--- a/ruby.spec
+++ b/ruby.spec
@@ -103,6 +103,8 @@ Patch4: ruby-1.9.3-fix-s390x-build.patch
 Patch8: ruby-1.9.3-custom-rubygems-location.patch
 # Add support for installing binary extensions according to FHS.
 # https://github.com/rubygems/rubygems/issues/210
+# Note that 8th patch might be resolved by
+# https://bugs.ruby-lang.org/issues/7897
 Patch9: rubygems-2.0.0-binary-extensions.patch
 # Make mkmf verbose by default
 Patch12: ruby-1.9.3-mkmf-verbose.patch