Update copyright to 2015
diff --git a/src/ruby/ext/grpc/rb_grpc.c b/src/ruby/ext/grpc/rb_grpc.c
index 8feefb0..2ec4ee5 100644
--- a/src/ruby/ext/grpc/rb_grpc.c
+++ b/src/ruby/ext/grpc/rb_grpc.c
@@ -1,6 +1,6 @@
/*
*
- * Copyright 2014, Google Inc.
+ * Copyright 2015, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@@ -273,4 +273,4 @@
Init_google_rpc_server_credentials();
Init_google_status_codes();
Init_google_time_consts();
-}
+}
\ No newline at end of file