[rubygem-trollop] Fix the gem install dir

[Bohuslav Kabrda]

commit e70cde9bec1e2c9cb18b0393f1dd49e877ee3993
Author: Bohuslav Kabrda <bkabrda at redhat.com>
Date:   Thu Mar 14 08:50:25 2013 +0100

    Fix the gem install dir

 rubygem-trollop.spec |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/rubygem-trollop.spec b/rubygem-trollop.spec
index 0b4a879..32ababa 100644
--- a/rubygem-trollop.spec
+++ b/rubygem-trollop.spec
@@ -29,7 +29,7 @@ number of lines of code (for you, the programmer).
 %install
 rm -rf %{buildroot}
 mkdir -p %{buildroot}%{gem_dir}
-%gem_install -n %{SOURCE0}
+%gem_install -n %{SOURCE0} -d %{buildroot}%{gem_dir}
 
 %check
 cd %{buildroot}/%{gem_instdir}