[clang] [WebAssembly] Generate __clang_call_terminate for Emscripten EH (PR #129020)

[Derek Schuff via cfe-commits]

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+// RUN: %clang_cc1 %s -triple wasm32-unknown-unknown -fexceptions -fcxx-exceptions -emit-llvm -o - -std=c++11 2>&1 | FileCheck %s
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dschuff wrote:

should this triple be wasm32-unknown-emscripten? Or do we use em-exceptions by default on all wasm triples?

https://github.com/llvm/llvm-project/pull/129020