RFR: JDK-8284754: print more interesting env variables in hs_err and VM.info

[Matthias Baesken]

There are a few more interesting env variables, e.g. documented here 
https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap08.html
that should be printed in hs_err for better supportability.
For example, TMPDIR is a cross platform addition to what was done for Windows with : 8283497: [windows] print TMP and TEMP in hs_err and VM.info .

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Commit messages:
 - JDK-8284754

Changes: https://git.openjdk.java.net/jdk/pull/8205/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=8205&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8284754
  Stats: 2 lines in 1 file changed: 1 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8205.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8205/head:pull/8205

PR: https://git.openjdk.java.net/jdk/pull/8205