RFR: 8316294: AIX: Build fopen system call fails on file _BUILD_LIBJDWP_objectfilenames.txt

[Adam Farley]

While building openjdk on aix, we see this build-fail error:

The fopen system call failed on file
-f/home/.....etce4tcetc...../_BUILD_LIBJDWP_objectfilenames.txt

This change expands the fix for the similar issue on macosx, and prevents the fopen issue on aix.

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Commit messages:
 - Fix for fopen bug on aix

Changes: https://git.openjdk.org/jdk/pull/15743/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=15743&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8316294
  Stats: 3 lines in 1 file changed: 2 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/15743.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15743/head:pull/15743

PR: https://git.openjdk.org/jdk/pull/15743