Add @Stable to java.lang.CharacterDataLatin1 and other CharacterData classes

[wenshao]

Classes such as java.lang.CharacterDataXXX have multiple static final arrays, 
which will not be modified. We should add @Stable to provide information to the 
optimizer.
such as
```java
class CharacterData00 {
@Stable static final char[] X =
@Stable static final char[] Y =
@Stable static final int[] A =
@Stable static final char[] B =
}
```
-
Shaojin Wen