RFR: 8252957: Wrong comment in CgroupV1Subsystem::cpu_quota

[Severin Gehwolf]

The comment is wrong. The 'us' in 'cpu.cfs_quota_us' stands for
microseconds, which is read verbatim. Similarly for cgroups v2
all units in 'cpu.max' are in microseconds.

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Commit messages:
 - 8252957: Wrong comment in CgroupV1Subsystem::cpu_quota

Changes: https://git.openjdk.java.net/jdk/pull/91/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=91&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8252957
  Stats: 4 lines in 2 files changed: 0 ins; 0 del; 4 mod
  Patch: https://git.openjdk.java.net/jdk/pull/91.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/91/head:pull/91

PR: https://git.openjdk.java.net/jdk/pull/91