[WebAssembly] Convert the remaining unit tests to the new wasm-object-file target.

To facilitate this, add a new hidden command-line option to disable
the explicit-locals pass. That causes llc to emit invalid code that doesn't
have all locals converted to get_local/set_local, however it simplifies
testwriting in many cases.

llvm-svn: 296540
diff --git a/llvm/test/CodeGen/WebAssembly/memory-addr32.ll b/llvm/test/CodeGen/WebAssembly/memory-addr32.ll
index bd11b81..ad599b1 100644
--- a/llvm/test/CodeGen/WebAssembly/memory-addr32.ll
+++ b/llvm/test/CodeGen/WebAssembly/memory-addr32.ll
@@ -1,9 +1,9 @@
-; RUN: llc < %s -asm-verbose=false -disable-wasm-fallthrough-return-opt | FileCheck %s
+; RUN: llc < %s -asm-verbose=false -disable-wasm-fallthrough-return-opt -disable-wasm-explicit-locals | FileCheck %s
 
 ; Test that basic memory operations assemble as expected with 32-bit addresses.
 
 target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
-target triple = "wasm32-unknown-unknown"
+target triple = "wasm32-unknown-unknown-wasm"
 
 declare i32 @llvm.wasm.current.memory.i32() nounwind readonly
 declare i32 @llvm.wasm.grow.memory.i32(i32) nounwind