Update ui test files

test_suite/tests/ui/expected-string/boolean.stderr

@@ -1,5 +1,5 @@
 error: expected serde rename attribute to be a string: `rename = "..."`
- --> $DIR/boolean.rs:5:22
+ --> $DIR/tests/ui/expected-string/boolean.rs:5:22
   |
 5 |     #[serde(rename = true)]
   |                      ^^^^

test_suite/tests/ui/expected-string/byte_character.stderr

@@ -1,5 +1,5 @@
 error: expected serde rename attribute to be a string: `rename = "..."`
- --> $DIR/byte_character.rs:5:22
+ --> $DIR/tests/ui/expected-string/byte_character.rs:5:22
   |
 5 |     #[serde(rename = b'a')]
   |                      ^^^^

test_suite/tests/ui/expected-string/byte_string.stderr

@@ -1,5 +1,5 @@
 error: expected serde rename attribute to be a string: `rename = "..."`
- --> $DIR/byte_string.rs:5:22
+ --> $DIR/tests/ui/expected-string/byte_string.rs:5:22
   |
 5 |     #[serde(rename = b"byte string")]
   |                      ^^^^^^^^^^^^^^

test_suite/tests/ui/expected-string/character.stderr

@@ -1,5 +1,5 @@
 error: expected serde rename attribute to be a string: `rename = "..."`
- --> $DIR/character.rs:5:22
+ --> $DIR/tests/ui/expected-string/character.rs:5:22
   |
 5 |     #[serde(rename = 'a')]
   |                      ^^^

test_suite/tests/ui/expected-string/float.stderr

@@ -1,5 +1,5 @@
 error: expected serde rename attribute to be a string: `rename = "..."`
- --> $DIR/float.rs:5:22
+ --> $DIR/tests/ui/expected-string/float.rs:5:22
   |
 5 |     #[serde(rename = 3.14)]
   |                      ^^^^

test_suite/tests/ui/expected-string/integer.stderr

@@ -1,5 +1,5 @@
 error: expected serde rename attribute to be a string: `rename = "..."`
- --> $DIR/integer.rs:5:22
+ --> $DIR/tests/ui/expected-string/integer.rs:5:22
   |
 5 |     #[serde(rename = 100)]
   |                      ^^^