[turbofan] Fix more -Wsign-compare warnings.

test/cctest/compiler/test-run-wasm-machops.cc

Index: test/cctest/compiler/test-run-wasm-machops.cc
diff --git a/test/cctest/compiler/test-run-wasm-machops.cc b/test/cctest/compiler/test-run-wasm-machops.cc
index 0b23669cf7d04280e551ff36d2b1bb03150fcc84..c3f42388d4cc23fe0978cf376b5e9a36e8fad4c2 100644
--- a/test/cctest/compiler/test-run-wasm-machops.cc
+++ b/test/cctest/compiler/test-run-wasm-machops.cc
@@ -51,7 +51,7 @@ static void RunLoadStoreRelocation(MachineType rep) {
     raw[i] = static_cast<byte>((i + sizeof(CType)) ^ 0xAA);
     new_raw[i] = static_cast<byte>((i + sizeof(CType)) ^ 0xAA);
   }
-  int32_t OK = 0x29000;
+  uint32_t OK = 0x29000;
   RawMachineAssemblerTester<uint32_t> m;
   Node* base = m.RelocatableIntPtrConstant(reinterpret_cast<intptr_t>(raw),
                                            RelocInfo::WASM_MEMORY_REFERENCE);
@@ -166,5 +166,5 @@ TEST(Uint32LessThanRelocation) {
   UpdateMemoryReferences(code, reinterpret_cast<Address>(1234),
                          reinterpret_cast<Address>(1234), 0x200, 0x400);
   // Check that after limit is increased, index is within bounds.
-  CHECK_EQ(0xaced, m.Call());
+  CHECK_EQ(0xacedu, m.Call());
 }