[wasm] WasmRunner can run tests with I64 parameters and return value.

src/compiler/x64/code-generator-x64.cc

Index: src/compiler/x64/code-generator-x64.cc
diff --git a/src/compiler/x64/code-generator-x64.cc b/src/compiler/x64/code-generator-x64.cc
index 8a64744d5cfd0b38ae3ca3813e971ed1c093a6b8..3b115ae78c7241307855971ff19cfe3ef0704ce2 100644
--- a/src/compiler/x64/code-generator-x64.cc
+++ b/src/compiler/x64/code-generator-x64.cc
@@ -1849,7 +1849,7 @@ static const int kQuadWordSize = 16;
 
 
 void CodeGenerator::AssemblePrologue() {
-  CallDescriptor* descriptor = linkage()->GetIncomingDescriptor();
+  const CallDescriptor* descriptor = linkage()->GetIncomingDescriptor();
   if (descriptor->IsCFunctionCall()) {
     __ pushq(rbp);
     __ movq(rbp, rsp);
@@ -1914,7 +1914,7 @@ void CodeGenerator::AssemblePrologue() {
 
 
 void CodeGenerator::AssembleReturn() {
-  CallDescriptor* descriptor = linkage()->GetIncomingDescriptor();
+  const CallDescriptor* descriptor = linkage()->GetIncomingDescriptor();
 
   // Restore registers.
   const RegList saves = descriptor->CalleeSavedRegisters();