fixup: use primordials

Author: ronag

lib/_stream_readable.js

@@ -43,6 +43,7 @@ const {
   ERR_METHOD_NOT_IMPLEMENTED,
   ERR_STREAM_UNSHIFT_AFTER_END_EVENT
 } = require('internal/errors').codes;
+const { Math } = primordials;
 
 // Lazy loaded to improve the startup performance.
 let StringDecoder;