RFR: 8277531: Print actual default stacksize on Windows thread logging [v2]

[KIRIYAMA Takuya]

> I modified to log actual stack size on Windows by using `os::win32::default_stack_size()`.
> Could you please review this fix?

KIRIYAMA Takuya has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains three additional commits since the last revision:

 - 8277531: Print actual default stacksize on Windows thread logging
 - Merge branch 'master' into 8277531
 - 8277531: Print actual default stacksize on Windows thread logging

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/6495/files
  - new: https://git.openjdk.java.net/jdk/pull/6495/files/85d114f8..3eb2d5c7

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=6495&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=6495&range=00-01

  Stats: 68230 lines in 1811 files changed: 44791 ins; 13591 del; 9848 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6495.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6495/head:pull/6495

PR: https://git.openjdk.java.net/jdk/pull/6495