[WebAssembly] Set std::numeric_limits's traps field for WebAssembly.

WebAssembly's integer division instruction traps on division by zero; set the
traps field of integral std::numeric_limits to true.


git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@257612 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed