[SanitizerCoverage] The section name for inline-bool-flag was too long for...

[SanitizerCoverage] The section name for inline-bool-flag was too long for darwin builds, so shortening it.

Summary:
Following up on the comments on D77638.

Not undoing rGd6525eff here at the moment, since I don't know how to test mac builds. Please let me know if I should include that here too.

Reviewers: vitalybuka

Reviewed By: vitalybuka

Subscribers: hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D77889