RFR: JDK-8259569: gtest os.dll_address_to_function_and_library_name_vm fails

[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

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

Commit messages:
 - Initial

Changes: https://git.openjdk.java.net/jdk/pull/2044/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=2044&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8259569
  Stats: 35 lines in 1 file changed: 0 ins; 35 del; 0 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