fix: const-attr-paths need .stderr issue tracking

Author: BarronKane

tests/ui/feature-gates/feature-gate-const-attr-paths-unresolved.stderr

@@ -4,6 +4,7 @@ error[E0658]: const item paths in builtin attributes are experimental
 LL | #[repr(align(UNKNOWN_ALIGN))]
    |              ^^^^^^^^^^^^^
    |
+   = note: see issue #52840 <https://github.com/rust-lang/rust/issues/52840> for more information
    = help: add `#![feature(const_attr_paths)]` to the crate attributes to enable
    = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
 
@@ -13,6 +14,7 @@ error[E0658]: const item paths in builtin attributes are experimental
 LL | #[repr(packed(UNKNOWN_PACK))]
    |               ^^^^^^^^^^^^
    |
+   = note: see issue #52840 <https://github.com/rust-lang/rust/issues/52840> for more information
    = help: add `#![feature(const_attr_paths)]` to the crate attributes to enable
    = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
 
@@ -22,6 +24,7 @@ error[E0658]: const item paths in builtin attributes are experimental
 LL | #[rustc_align(UNKNOWN_FN_ALIGN)]
    |               ^^^^^^^^^^^^^^^^
    |
+   = note: see issue #52840 <https://github.com/rust-lang/rust/issues/52840> for more information
    = help: add `#![feature(const_attr_paths)]` to the crate attributes to enable
    = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
 
@@ -31,6 +34,7 @@ error[E0658]: const item paths in builtin attributes are experimental
 LL | #[rustc_align_static(UNKNOWN_STATIC_ALIGN)]
    |                      ^^^^^^^^^^^^^^^^^^^^
    |
+   = note: see issue #52840 <https://github.com/rust-lang/rust/issues/52840> for more information
    = help: add `#![feature(const_attr_paths)]` to the crate attributes to enable
    = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
 

tests/ui/feature-gates/feature-gate-const-attr-paths.stderr

@@ -4,6 +4,7 @@ error[E0658]: const item paths in builtin attributes are experimental
 LL | #[repr(align(REPR_ALIGN))]
    |              ^^^^^^^^^^
    |
+   = note: see issue #52840 <https://github.com/rust-lang/rust/issues/52840> for more information
    = help: add `#![feature(const_attr_paths)]` to the crate attributes to enable
    = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
 
@@ -13,6 +14,7 @@ error[E0658]: const item paths in builtin attributes are experimental
 LL | #[repr(packed(REPR_PACK))]
    |               ^^^^^^^^^
    |
+   = note: see issue #52840 <https://github.com/rust-lang/rust/issues/52840> for more information
    = help: add `#![feature(const_attr_paths)]` to the crate attributes to enable
    = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
 
@@ -22,6 +24,7 @@ error[E0658]: const item paths in builtin attributes are experimental
 LL | #[rustc_align(FN_ALIGN)]
    |               ^^^^^^^^
    |
+   = note: see issue #52840 <https://github.com/rust-lang/rust/issues/52840> for more information
    = help: add `#![feature(const_attr_paths)]` to the crate attributes to enable
    = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
 
@@ -31,6 +34,7 @@ error[E0658]: const item paths in builtin attributes are experimental
 LL | #[rustc_align_static(STATIC_ALIGN)]
    |                      ^^^^^^^^^^^^
    |
+   = note: see issue #52840 <https://github.com/rust-lang/rust/issues/52840> for more information
    = help: add `#![feature(const_attr_paths)]` to the crate attributes to enable
    = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date