Move workaround_list to grpc_base
diff --git a/grpc.gemspec b/grpc.gemspec
index 8de816c..5ee48c3 100755
--- a/grpc.gemspec
+++ b/grpc.gemspec
@@ -69,7 +69,6 @@
   s.files += %w( include/grpc/support/tls_msvc.h )
   s.files += %w( include/grpc/support/tls_pthread.h )
   s.files += %w( include/grpc/support/useful.h )
-  s.files += %w( include/grpc/support/workaround_list.h )
   s.files += %w( include/grpc/impl/codegen/atm.h )
   s.files += %w( include/grpc/impl/codegen/atm_gcc_atomic.h )
   s.files += %w( include/grpc/impl/codegen/atm_gcc_sync.h )
@@ -155,6 +154,7 @@
   s.files += %w( include/grpc/slice.h )
   s.files += %w( include/grpc/slice_buffer.h )
   s.files += %w( include/grpc/status.h )
+  s.files += %w( include/grpc/support/workaround_list.h )
   s.files += %w( include/grpc/impl/codegen/byte_buffer_reader.h )
   s.files += %w( include/grpc/impl/codegen/compression_types.h )
   s.files += %w( include/grpc/impl/codegen/connectivity_state.h )