RFR: 8358769: Update --release 25 symbol information for JDK 25 build 27

[Nizar Benalla]

On Tue, 17 Jun 2025 16:24:04 GMT, Joe Darcy <darcy at openjdk.org> wrote:

>> Usual symbol file update for a new JDK build.
>
> src/jdk.compiler/share/data/symbols/java.base-P.sym.txt line 54:
> 
>> 52: -method name readln descriptor ()Ljava/lang/String;
>> 53: 
>> 54: class name java/io/Reader
> 
> Seeing this is surprising since JDK-8354724: "Methods in java.io.Reader to read all characters and all lines" which added these methods was add in JDK 25 build _26_ while, presumably many other changes from build 26 are already present in the symbol file.

I used "build 27" in the JBS/PR title because I did not update the symbol changes for build 26, and 27 was the latest I could find on `https://jdk.java.net/25/ `
I will update this with only changes that were in that build.

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PR Review Comment: https://git.openjdk.org/jdk/pull/25854#discussion_r2153981116