RFR: 8274986: max code printed in hs-err logs should be configurable [v2]

[Doug Simon]

> This PR adds a `ErrorLogPrintCodeLimit` (develop) option for configuring the amount of code printed in a hs-err log file. There's a hard limit of 10 so that the buffer used to avoid duplicates in `VMError::print_code` is stack allocated.
> In addition, the Java stack is also scanned when considering code to print as the native stack may not have any Java compiled frames. For example, a transition into the VM through a RuntimeStub can prevent the native stack walk from seeing the frames above the stub.
> The MachCodeFramesInErrorFile test has been made more robust in terms of validating its expectations of how C2 intrinsifies methods.
> 
> There's one other minor change to address [this comment](https://github.com/openjdk/jdk/pull/5446#issuecomment-938518814).

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

  made ErrorLogPrintCodeLimit a diagnostic flag

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/5875/files
  - new: https://git.openjdk.java.net/jdk/pull/5875/files/5b141c15..ae0fa83a

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=5875&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=5875&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/5875.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/5875/head:pull/5875

PR: https://git.openjdk.java.net/jdk/pull/5875