Fix unused parameters for the Mac.

Change-Id: I76086cc1f448d058de61a613078055d8f01ba4b3
diff --git a/runtime/arch/x86_64/entrypoints_init_x86_64.cc b/runtime/arch/x86_64/entrypoints_init_x86_64.cc
index be73594..1661554 100644
--- a/runtime/arch/x86_64/entrypoints_init_x86_64.cc
+++ b/runtime/arch/x86_64/entrypoints_init_x86_64.cc
@@ -119,6 +119,7 @@
 void InitEntryPoints(InterpreterEntryPoints* ipoints, JniEntryPoints* jpoints,
                      PortableEntryPoints* ppoints, QuickEntryPoints* qpoints) {
 #if defined(__APPLE__)
+  UNUSED(ipoints, jpoints, ppoints, qpoints);
   UNIMPLEMENTED(FATAL);
 #else
   // Interpreter