[ruby] Introduce %{gem_archdir} macro.

[Vít Ondruch]

commit 56d430e19a5c5e9c427ba76550ca031bf85d12b9
Author: Vít Ondruch <vondruch at redhat.com>
Date:   Tue Apr 30 14:39:52 2013 +0200

    Introduce %{gem_archdir} macro.

 macros.rubygems |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/macros.rubygems b/macros.rubygems
index 2856b21..b82a9fb 100644
--- a/macros.rubygems
+++ b/macros.rubygems
@@ -1,9 +1,10 @@
 # The RubyGems root folder.
 %gem_dir %{_datadir}/gems
+%gem_archdir %{_libdir}/gems
 
 # Common gem locations and files.
 %gem_instdir %{gem_dir}/gems/%{gem_name}-%{version}
-%gem_extdir_mri %{_libdir}/gems/%{name}/%{gem_name}-%{version}
+%gem_extdir_mri %{gem_archdir}/%{name}/%{gem_name}-%{version}
 %gem_libdir %{gem_instdir}/lib
 %gem_cache %{gem_dir}/cache/%{gem_name}-%{version}.gem
 %gem_spec %{gem_dir}/specifications/%{gem_name}-%{version}.gemspec