also reserve wasm schemes on imported names

Author: guybedford

document/js-api/index.bs

@@ -1406,6 +1406,8 @@ To <dfn export>parse a WebAssembly module</dfn> given a <a>byte sequence</a> |by
 1. For each (|moduleName|, |name|, |type|) in [=module_imports=](|module|.\[[Module]]),
     1. If |moduleName| starts with the prefix "wasm-js:",
         1. Throw a {{LinkError}} exception.
+    1. If |name| starts with the prefix "wasm:" or "wasm-js:",
+        1. Throw a {{LinkError}} exception.
     1. Note: The following step only applies when integrating with the JS String Builtins proposal.
     1. If [=Find a builtin=] with (|moduleName|, |name|, |type|) and builtins |module|.\[[BuiltinSets]] is not null, then [=iteration/continue=].
     1. [=set/Append=] |moduleName| to |requestedModules|.