[NFC] StackProtector: be consistent and to initialize DominatorTreeWr…

…apperPass

We already ask for it, so it might be good to ensure that it is
actually initialized before us. Doesn't seem to matter in practice though.

llvm/lib/CodeGen/StackProtector.cpp

@@ -70,6 +70,7 @@ StackProtector::StackProtector() : FunctionPass(ID), SSPBufferSize(8) {
 INITIALIZE_PASS_BEGIN(StackProtector, DEBUG_TYPE,
                       "Insert stack protectors", false, true)
 INITIALIZE_PASS_DEPENDENCY(TargetPassConfig)
+INITIALIZE_PASS_DEPENDENCY(DominatorTreeWrapperPass)
 INITIALIZE_PASS_END(StackProtector, DEBUG_TYPE,
                     "Insert stack protectors", false, true)