Unbreak build fon non-TF targets.

src/compiler/linkage.cc

Index: src/compiler/linkage.cc
diff --git a/src/compiler/linkage.cc b/src/compiler/linkage.cc
index 87aa81b6d1b3776dba1ecabd67dbf97f855382f5..a97e484270f08a38dd300ba315f273ba72782f69 100644
--- a/src/compiler/linkage.cc
+++ b/src/compiler/linkage.cc
@@ -220,7 +220,8 @@ bool Linkage::NeedsFrameState(Runtime::FunctionId function) {
 // Provide unimplemented methods on unsupported architectures, to at least link.
 //==============================================================================
 #if !V8_TURBOFAN_BACKEND
-CallDescriptor* Linkage::GetJSCallDescriptor(int parameter_count, Zone* zone) {
+CallDescriptor* Linkage::GetJSCallDescriptor(int parameter_count, Zone* zone,
+                                             CallDescriptor::Flags flags) {
   UNIMPLEMENTED();
   return NULL;
 }