[llvm] WebAssembly: Move runtime libcall setting out of TargetLowering (PR #142624)

[Derek Schuff via llvm-commits]

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@@ -277,5 +277,10 @@ void RuntimeLibcallsInfo::initLibcalls(const Triple &TT) {
       setLibcallName(RTLIB::MULO_I64, nullptr);
     }
     setLibcallName(RTLIB::MULO_I128, nullptr);
+  } else {
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dschuff wrote:

I suspect this predates when we had an emscripten triple, and it should probably be behind `isOSEmscripten()`

https://github.com/llvm/llvm-project/pull/142624