[GenericSignature] Correct the order of arguments to GenericTypeParamType::get

when creating the generic signature for an opened pack element.

Author: hborla

lib/AST/ASTContext.cpp

@@ -5602,8 +5602,8 @@ ASTContext::getOpenedElementSignature(CanGenericSignature baseGenericSig) {
 
   auto eraseParameterPack = [&](GenericTypeParamType *paramType) {
     return GenericTypeParamType::get(
-        paramType->getDepth(), paramType->getIndex(),
-        /*isParameterPack=*/false, *this);
+        /*isParameterPack=*/false, paramType->getDepth(),
+        paramType->getIndex(), *this);
   };
 
   for (auto paramType : baseGenericSig.getGenericParams()) {