[clang] [WebAssembly] Add more features to generic CPU config (PR #80923)

[Dan Gohman via cfe-commits]

================
@@ -259,6 +259,10 @@ AIX Support
 WebAssembly Support
 ^^^^^^^^^^^^^^^^^^^
 
+The -mcpu=generic configuration now enables nontrapping-fptoint, multivalue,
+reference-types, and bulk-memory.These proposals are standardized and available
+in all major engines.
----------------
sunfishcode wrote:

Could you also mention that enabling multivalue here just means enabling the language feauture, and not changing the ABI?


https://github.com/llvm/llvm-project/pull/80923