test: support odd value for kStringMaxLength
V8 6.2 will support a larger maximum string length on 64-bit platforms. Update the test to take into account its odd value ((1 << 30) - 1 - 24).
Refs: https://github.com/v8/v8/commit/e8c9649e2570c7e278e70a6584738a3c3f828b2b Example failing test on canary: https://ci.nodejs.org/job/node-test-commit-linux/11406/nodes=centos7-64/console
@nodejs/v8
Checklist
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make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
commit message follows commit guidelines
Affected core subsystem(s)
buffer, V8