RFR: 8265666: Enable AIX build platform to make external debug symbols

[Andrew Leonard]

Signed-off-by: Andrew Leonard <anleonar at redhat.com>

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Commit messages:
 - 8265666: Enable AIX build platform to make external debug symbols

Changes: https://git.openjdk.java.net/jdk/pull/3763/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=3763&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8265666
  Stats: 15 lines in 2 files changed: 4 ins; 9 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3763.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3763/head:pull/3763

PR: https://git.openjdk.java.net/jdk/pull/3763