[Test] Moved declaration to top.

Author: nate-chandler

test/SILOptimizer/address_lowering.sil

@@ -27,6 +27,8 @@ protocol Error {}
 
 struct I {}
 
+class Klass {}
+
 struct SI<T> {
   var element: T
   var index: I
@@ -1426,8 +1428,6 @@ bb0(%0 : @guaranteed $TestGeneric<T>):
   return %10 : $()
 }
 
-class Klass {}
-
 // CHECK-LABEL: sil hidden [ossa] @testBeginApply2LoadableYieldWithIndirectConv :
 // CHECK: bb0(%0 : @guaranteed $TestGeneric<Klass>):
 // CHECK:   [[STK:%.*]] = alloc_stack $Klass