[jdk11u-dev] RFR: 8273804: Platform.isTieredSupported should handle the no-compiler case [v3]

[Kangcheng Xu]

> a clean backport of [JDK-8273804](https://bugs.openjdk.org/browse/JDK-8273804).

Kangcheng Xu has updated the pull request incrementally with one additional commit since the last revision:

  8273804: Platform.isTieredSupported should handle the no-compiler case
  
  Backport-of: 46af82e5b0d176e340f46125f8a3bb17e56bd7b3

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Changes:
  - all: https://git.openjdk.org/jdk11u-dev/pull/2201/files
  - new: https://git.openjdk.org/jdk11u-dev/pull/2201/files/639afbe6..204e96ae

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2201&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2201&range=01-02

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/2201.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/2201/head:pull/2201

PR: https://git.openjdk.org/jdk11u-dev/pull/2201