RFR: 8293288: bootcycle build failure after JDK-8173605

[Jie Fu]

Hi all,

bootcycle fails to build after JDK-8173605 due to the following two warnings

warning: [options] source value 8 is obsolete and will be removed in a future release
warning: [options] target value 8 is obsolete and will be removed in a future release


To suppress warnings about obsolete options, `-Xlint:-options` is added.

Thanks.
Best regards,
Jie

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Commit messages:
 - 8293288: bootcycle build failure after JDK-8173605

Changes: https://git.openjdk.org/jdk/pull/10135/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=10135&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8293288
  Stats: 2 lines in 1 file changed: 1 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/10135.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10135/head:pull/10135

PR: https://git.openjdk.org/jdk/pull/10135