Rewrite async_exec_lock using mpscq
diff --git a/grpc.gemspec b/grpc.gemspec
index 2aad578..de488d6 100755
--- a/grpc.gemspec
+++ b/grpc.gemspec
@@ -123,6 +123,7 @@
s.files += %w( src/core/lib/support/murmur_hash.c )
s.files += %w( src/core/lib/support/slice.c )
s.files += %w( src/core/lib/support/slice_buffer.c )
+ s.files += %w( src/core/lib/support/stack_lockfree.c )
s.files += %w( src/core/lib/support/string.c )
s.files += %w( src/core/lib/support/string_posix.c )
s.files += %w( src/core/lib/support/string_util_win32.c )