[rubygem-open4] Fix installation directory.

[Vít Ondruch]

commit a246cb4a01d8c31c8d0eac8d436b21b981f91f5b
Author: Vít Ondruch <vondruch at redhat.com>
Date:   Thu Mar 7 15:56:58 2013 +0100

    Fix installation directory.

 rubygem-open4.spec |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/rubygem-open4.spec b/rubygem-open4.spec
index 63da4fa..713f281 100644
--- a/rubygem-open4.spec
+++ b/rubygem-open4.spec
@@ -34,7 +34,7 @@ Documentation for %{name}
 %install
 rm -rf %{buildroot}
 mkdir -p %{buildroot}%{gem_dir}
-%gem_install -n %{SOURCE0}
+%gem_install -n %{SOURCE0} -d %{buildroot}%{gem_dir}
 
 %check
 pushd %{buildroot}%{gem_instdir}