[WebAssembly] Update ADT/TripleTest.cpp now that default file format has changed

Differential Revision: https://reviews.llvm.org/D43212

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@324966 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed