Update ui tests to nightly-2020-02-08

test_suite/tests/ui/remote/wrong_de.stderr

@@ -6,3 +6,5 @@ error[E0308]: mismatched types
   |          |
   |          expected `u16`, found `u8`
   |          help: you can convert an `u8` to `u16`: `Deserialize.into()`
+  |
+  = note: this error originates in a derive macro (in Nightly builds, run with -Z macro-backtrace for more info)

test_suite/tests/ui/remote/wrong_getter.stderr

@@ -6,3 +6,4 @@ error[E0308]: mismatched types
    |
    = note: expected reference `&u8`
               found reference `&u16`
+   = note: this error originates in a derive macro (in Nightly builds, run with -Z macro-backtrace for more info)

test_suite/tests/ui/remote/wrong_ser.stderr

@@ -6,3 +6,4 @@ error[E0308]: mismatched types
   |
   = note: expected reference `&u8`
              found reference `&u16`
+  = note: this error originates in a derive macro (in Nightly builds, run with -Z macro-backtrace for more info)

test_suite/tests/ui/struct-representation/internally-tagged-unit.stderr

@@ -3,3 +3,5 @@ error: #[serde(tag = "...")] can only be used on enums and structs with named fi
   |
 3 | #[derive(Serialize)]
   |          ^^^^^^^^^
+  |
+  = note: this error originates in a derive macro (in Nightly builds, run with -Z macro-backtrace for more info)