Merge pull request #6510 from murgatroid99/ruby_tools_gem_fix

Fixed references in grpc-tools gemspec
diff --git a/src/ruby/tools/grpc-tools.gemspec b/src/ruby/tools/grpc-tools.gemspec
index af904de..9fa4b66 100644
--- a/src/ruby/tools/grpc-tools.gemspec
+++ b/src/ruby/tools/grpc-tools.gemspec
@@ -18,5 +18,5 @@
 
   s.platform = Gem::Platform::RUBY
 
-  s.executables = %w( protoc.rb protoc_grpc_ruby_plugin.rb )
+  s.executables = %w( grpc_tools_ruby_protoc.rb grpc_tools_ruby_protoc_plugin.rb )
 end