RFR: 8282690: runtime/CommandLine/VMDeprecatedOptions.java fails after JDK-8281181

[Ioi Lam]

Please review this small fix. The two options `UseContainerCpuShares` and `PreferContainerQuotaForCPUCount` are available only on Linux, so they are tested under `if (Platform.isLinux()) { ...}`

Tested with tiers 1-4

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Commit messages:
 - 8282690: runtime/CommandLine/VMDeprecatedOptions.java fails after JDK-8281181

Changes: https://git.openjdk.java.net/jdk/pull/7712/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=7712&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8282690
  Stats: 16 lines in 2 files changed: 13 ins; 3 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7712.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7712/head:pull/7712

PR: https://git.openjdk.java.net/jdk/pull/7712