[WebAssembly] Add minimal support for the new wasm object format triple.

llvm-svn: 292269
diff --git a/clang/lib/CodeGen/BackendUtil.cpp b/clang/lib/CodeGen/BackendUtil.cpp
index b70cefa..765c403 100644
--- a/clang/lib/CodeGen/BackendUtil.cpp
+++ b/clang/lib/CodeGen/BackendUtil.cpp
@@ -999,6 +999,7 @@
     return "__LLVM,__bitcode";
   case Triple::COFF:
   case Triple::ELF:
+  case Triple::Wasm:
   case Triple::UnknownObjectFormat:
     return ".llvmbc";
   }
@@ -1011,6 +1012,7 @@
     return "__LLVM,__cmdline";
   case Triple::COFF:
   case Triple::ELF:
+  case Triple::Wasm:
   case Triple::UnknownObjectFormat:
     return ".llvmcmd";
   }