DI: Tweak definite_init_markuninitialized_derivedself.sil test to match what SILGen actually emits

Author: slavapestov

test/SILOptimizer/definite_init_markuninitialized_derivedself.sil

@@ -121,7 +121,7 @@ bb0(%0 : @owned $DerivedClassWithIVars):
   %14 = function_ref @superinit : $@convention(method) (@owned RootClassWithIVars) -> @owned RootClassWithIVars
   %15 = apply %14(%13) : $@convention(method) (@owned RootClassWithIVars) -> @owned RootClassWithIVars     // expected-error {{property 'self.a' not initialized at super.init call}}
   %16 = unchecked_ref_cast %15 : $RootClassWithIVars to $DerivedClassWithIVars
-  assign %16 to %3 : $*DerivedClassWithIVars
+  store %16 to [init] %3 : $*DerivedClassWithIVars
 
   %18 = load [copy] %3 : $*DerivedClassWithIVars
   destroy_value %1 : $<τ_0_0> { var τ_0_0 } <DerivedClassWithIVars>
@@ -272,7 +272,7 @@ bb0(%0 : @owned $DerivedClassWithIVars, %i : @trivial $Int):
   // Call super.init.
   %15 = apply %14(%13) : $@convention(method) (@owned RootClassWithIVars) -> @owned RootClassWithIVars
   %16 = unchecked_ref_cast %15 : $RootClassWithIVars to $DerivedClassWithIVars
-  assign %16 to %3 : $*DerivedClassWithIVars
+  store %16 to [init] %3 : $*DerivedClassWithIVars
   %18 = load [copy] %3 : $*DerivedClassWithIVars
   destroy_value %1 : $<τ_0_0> { var τ_0_0 } <DerivedClassWithIVars>
   return %18 : $DerivedClassWithIVars