RFR: 8272586: emit abstract machine code in hs-err logs [v2]

[Doug Simon]

> This enhances hs-err logs to:
> * Show the [abstract machine code](https://bugs.openjdk.java.net/browse/JDK-8213084) of the crashing frame if a disassembler is not installed.
> * Show machine code for the top frames on the native stack.
> 
> An interpreter or stub frame is only shown if it is the crashing frame.
> 
> A sample of the enhanced hs-err log can be seen [here](https://bugs.openjdk.java.net/secure/attachment/96664/hs_err_pid7179.log).

Doug Simon has updated the pull request incrementally with one additional commit since the last revision:

  use nullptr instead of 0 or implicit NULL tests

-------------

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/5446/files
  - new: https://git.openjdk.java.net/jdk/pull/5446/files/a9bf07e3..0a69c058

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=5446&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=5446&range=00-01

  Stats: 3 lines in 1 file changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.java.net/jdk/pull/5446.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/5446/head:pull/5446

PR: https://git.openjdk.java.net/jdk/pull/5446