Fixes path issue in derive-impl (#1823)

Needs https://github.com/sam0x17/macro_magic/pull/13

The associated PR allows the export of tokens from macro_magic at the
specified path. This fixes the path issue in derive-impl. Now, we can
import the default config using the standard rust syntax:

```rust
use frame_system::config_preludes::TestDefaultConfig;

[derive_impl(TestDefaultConfig as frame_system::DefaultConfig)]
impl frame_system::DefaultConfig for Test {
   //....
}
```

substrate/frame/support/procedural/src/lib.rs

@@ -34,7 +34,7 @@ mod transactional;
 mod tt_macro;
 
 use frame_support_procedural_tools::generate_crate_access_2018;
-use macro_magic::import_tokens_attr;
+use macro_magic::{import_tokens_attr, import_tokens_attr_verbatim};
 use proc_macro::TokenStream;
 use quote::{quote, ToTokens};
 use std::{cell::RefCell, str::FromStr};
@@ -751,7 +751,7 @@ pub fn storage_alias(attributes: TokenStream, input: TokenStream) -> TokenStream
 /// Items that lack a `syn::Ident` for whatever reason are first checked to see if they exist,
 /// verbatim, in the local/destination trait before they are copied over, so you should not need to
 /// worry about collisions between identical unnamed items.
-#[import_tokens_attr {
+#[import_tokens_attr_verbatim {
     format!(
         "{}::macro_magic",
         match generate_crate_access_2018("frame-support") {
@@ -868,7 +868,7 @@ pub fn register_default_impl(attrs: TokenStream, tokens: TokenStream) -> TokenSt
 		attrs,
 		item_impl.to_token_stream(),
 		true,
-		true,
+		false,
 	) {
 		Ok(tokens) => tokens.into(),
 		Err(err) => err.to_compile_error().into(),