[wasm] Backoff implementation for F64Trunc using std::trunc.

src/compiler/wasm-linkage.cc

Index: src/compiler/wasm-linkage.cc
diff --git a/src/compiler/wasm-linkage.cc b/src/compiler/wasm-linkage.cc
index 1023e9d832dc2c4568d26d27655b4e999c94b4b6..7dd36621e9ae97f454c73c0f4fc9d554d97ca0e9 100644
--- a/src/compiler/wasm-linkage.cc
+++ b/src/compiler/wasm-linkage.cc
@@ -264,6 +264,7 @@ CallDescriptor* ModuleEnv::GetWasmCallDescriptor(Zone* zone,
   // The target for WASM calls is always a code object.
   MachineType target_type = MachineType::AnyTagged();
   LinkageLocation target_loc = LinkageLocation::ForAnyRegister();
+
   return new (zone) CallDescriptor(       // --
       CallDescriptor::kCallCodeObject,    // kind
       target_type,                        // target MachineType