RFR: 8261966: macOS M1: report in hs_err log if we are running x86 code in emulation mode (Rosetta)

[Gerard Ziemski]

Please review this simple enhancement where we indicate in hs_err log file whether the CPU is being emulated. Right now the only use case is for Apple's M1 aarch64 running x64 code, i.e. "Rosetta" emulation.

This enhancement will insert `(EMULATED)` label after we print host CPU type, ex:

`Host: Oracles-MacBook-Pro-16.local, MacBookPro16,1 x86_64 2600 MHz (EMULATED), 12 cores, 32G, Darwin 19.6.0, macOS 10.15.7 (19H114)`

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Commit messages:
 - indicate whether the CPU is being emulated in hs_err log

Changes: https://git.openjdk.java.net/jdk/pull/3077/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=3077&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8261966
  Stats: 7 lines in 1 file changed: 6 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3077.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3077/head:pull/3077

PR: https://git.openjdk.java.net/jdk/pull/3077