Import internal commit b1320d9de0fac94e84113f489e71bfe68b3913ca : [APPROVAL] origin/review/oss-issue-5-bsls-timeutil-darwin-includes_drqs-36883008 to master
Import internal commit b1320d9de0fac94e84113f489e71bfe68b3913ca : [APPROVAL] origin/review/oss-issue-5-bsls-timeutil-darwin-includes_drqs-36883008 to master

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