Update ui test files

test_suite/tests/ui/precondition/deserialize_de_lifetime.stderr

@@ -1,5 +1,5 @@
 error: cannot deserialize when there is a lifetime parameter called 'de
- --> $DIR/deserialize_de_lifetime.rs:4:10
+ --> $DIR/tests/ui/precondition/deserialize_de_lifetime.rs:4:10
   |
 4 | struct S<'de> {
   |          ^^^

test_suite/tests/ui/precondition/deserialize_dst.stderr

@@ -1,5 +1,5 @@
 error: cannot deserialize a dynamically sized struct
- --> $DIR/deserialize_dst.rs:4:1
+ --> $DIR/tests/ui/precondition/deserialize_dst.rs:4:1
   |
 4 | / struct S {
 5 | |     string: String,

test_suite/tests/ui/precondition/serialize_field_identifier.stderr

@@ -1,5 +1,5 @@
 error: field identifiers cannot be serialized
- --> $DIR/serialize_field_identifier.rs:4:1
+ --> $DIR/tests/ui/precondition/serialize_field_identifier.rs:4:1
   |
 4 | / #[serde(field_identifier)]
 5 | | enum F {

test_suite/tests/ui/precondition/serialize_variant_identifier.stderr

@@ -1,5 +1,5 @@
 error: variant identifiers cannot be serialized
- --> $DIR/serialize_variant_identifier.rs:4:1
+ --> $DIR/tests/ui/precondition/serialize_variant_identifier.rs:4:1
   |
 4 | / #[serde(variant_identifier)]
 5 | | enum F {