RFR: 8352141: UBSAN: fix the left shift of negative value in relocInfo.cpp, internal_word_Relocation::pack_data_to()

[Afshin Zafari]

On Mon, 24 Mar 2025 18:19:29 GMT, Vladimir Kozlov <kvn at openjdk.org> wrote:

> Why it is UB for signed left shift for negative value?

For example in

    signed short int x = -32768;
    signed short int y = x << 1;

the value of `y` would be `0`.

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PR Comment: https://git.openjdk.org/jdk/pull/24196#issuecomment-2750746885