sh_06.ex tp379 fails on Linux

[mgree]

Assertion #379 (A): Test of GA11 - the utility recreates files with correct attributes.
Contents of _ga11_errout:
Testing GA11 for directory
Testing GA11 for regular file
getconf: Unrecognized variable `_POSIX_TIMESTAMP_RESOLUTION'
CheckFileTimes: could not obtain timestamp resolution -
continuing with assumed resolution of 1 second
Testing GA11 for FIFO
getconf: Unrecognized variable `_POSIX_TIMESTAMP_RESOLUTION'
CheckFileTimes: could not obtain timestamp resolution -
continuing with assumed resolution of 1 second
Failure: File ctime 1571676327.687798556 outside of acceptable range 1571676330.000000000 to 1571676330.843451261
Testing GA11 for a symbolic link to an existing file
getconf: Unrecognized variable `_POSIX_TIMESTAMP_RESOLUTION'
CheckFileTimes: could not obtain timestamp resolution -
continuing with assumed resolution of 1 second
Testing GA11 for a symbolic link to a non-existing file
getconf: Unrecognized variable `_POSIX_TIMESTAMP_RESOLUTION'
CheckFileTimes: could not obtain timestamp resolution -
continuing with assumed resolution of 1 second

Either my new laptop is too slow, Linux/Docker is misconfigured, or there's an actual bug.