RFR: JDK-8259569: gtest os.dll_address_to_function_and_library_name_vm fails [v2]

[Thomas Stuefe]

> May I have reviews please for this small and trivial change.
> 
> With JDK-8258606 (https://bugs.openjdk.java.net/browse/JDK-8258606), I added a new function to print a function pointer, as well as gtests. Turns out the gtests are too fragile, e.g. depend on the existence of the demangle library on AIX - so I remove some parts of them. 
> 
> Thanks, Thomas

Thomas Stuefe 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:

 - Re-enable gtest
 - Merge
 - Initial

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/2044/files
  - new: https://git.openjdk.java.net/jdk/pull/2044/files/b03dcb1b..159869be

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=2044&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=2044&range=00-01

  Stats: 3307 lines in 165 files changed: 1720 ins; 602 del; 985 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2044.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2044/head:pull/2044

PR: https://git.openjdk.java.net/jdk/pull/2044