RFR: 8258917: NativeMemoryTracking is handled by launcher inconsistenly

[Alex Menkov]

The fix adds NMT handling for non-java launchers

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Commit messages:
 - Handle NMT for non-java launchers

Changes: https://git.openjdk.java.net/jdk/pull/2106/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=2106&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8258917
  Stats: 16 lines in 2 files changed: 8 ins; 1 del; 7 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2106.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2106/head:pull/2106

PR: https://git.openjdk.java.net/jdk/pull/2106