File rubygem-sprockets3-fix-test-install.patch of Package rubygem-sprockets3

diff --git a/sprockets.gemspec b/sprockets.gemspec
index 649e51e0..b36634cf 100644
--- a/sprockets.gemspec
+++ b/sprockets.gemspec
@@ -9,6 +9,7 @@ Gem::Specification.new do |s|
   s.license = "MIT"
 
   s.files = Dir["README.md", "CHANGELOG.md", "LICENSE", "lib/**/*.rb"]
+  s.test_files = Dir['test/**/*'] + Dir['test/**/.sprockets*']
   s.executables = ["sprockets"]
 
   s.add_dependency "rack",            "> 1", "< 3"