RFR: 8299254: Support dealing with standard assert macro [v2]

[Kim Barrett]

> Please review this change to provide and use mechanisms for dealing with uses
> of the standard assert macro (from <assert.h> or <cassert>) in 3rd party code
> that we use in HotSpot.
> 
> We provide a pair of utility header files, to be included before and after a
> header that may use (and so include) the standard assert macro.  These new
> headers provide a scope in which the HotSpot assert macro is not defined, and
> then reinstated after.
> 
> We also define NDEBUG in release builds of HotSpot, so any uses of the
> standard assert macro in such 3rd party code will be disabled.
> 
> Finally, we use the new utility headers in some gtests and in our gtest
> wrapper header (unittest.hpp), eliminating problems the gtest implementation
> and with some versions of some standard libraries that the tests use.
> 
> Testing:
> mach5 tier1

Kim Barrett 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 four additional commits since the last revision:

 - Merge branch 'master' into std-assert
 - define NDEBUG in HotSpot release builds
 - use vmassert_uninstall/reinstall in gtests
 - utility for manipulating HotSpot assert macro

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/11770/files
  - new: https://git.openjdk.org/jdk/pull/11770/files/8b9a2d60..c122a265

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=11770&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=11770&range=00-01

  Stats: 5917 lines in 567 files changed: 2798 ins; 1954 del; 1165 mod
  Patch: https://git.openjdk.org/jdk/pull/11770.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11770/head:pull/11770

PR: https://git.openjdk.org/jdk/pull/11770