Store arity of functions in llvm context to generate correct calls.

src/gmachine.cpp

@@ -109,7 +109,7 @@ namespace lily {
     void instruction_push_global::gen_llvm(llvm_context& ctx) {
         llvm::Value* stack = ctx.get_current_function()->arg_begin();
         llvm::Value* new_node = builder.CreateCall(malloc_node_global_func,
-                { get_int8_constant(2), ctx.get_supercombinator(name) }, "temp");
+                { get_int8_constant(ctx.get_supercombinator_arity(name)), ctx.get_supercombinator_function(name) }, "temp");
         // TODO get arity
         builder.CreateCall(stack_push_func, { stack, new_node });
     }