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ARROW-17478: [C++][Java] Update ORC to 1.7.6 (#13926)

This PR aims to upgrade ORC to version 1.7.6.

Apache ORC 1.7.6 is the most recent maintenance release with the following bug fixes.

- https://github.com/apache/orc/releases/tag/v1.7.6
- https://orc.apache.org/news/2022/08/17/ORC-1.7.6/ 

Authored-by: William Hyun <william@apache.org>
Signed-off-by: Sutou Kouhei <kou@clear-code.com>