RFR: JDK-8311938: Add default cups include location for configure on AIX [v2]

[Christoph Langer]

On Tue, 1 Aug 2023 12:50:47 GMT, Andreas Steiner <duke at openjdk.org> wrote:

>> Add the default include location(/opt/freeware/include/) for cups on AIX. With this set the additional configure parameter --with-cups-include can be removed, which was needed on AIX.
>
> Andreas Steiner has updated the pull request incrementally with one additional commit since the last revision:
> 
>   set default cups include location if with_cups is not set only, update copyright year

Hm, I still think it's clearer to have the AIX default cups check in the next section after `if test "x$CUPS_FOUND" = xno; then`.
Currently,  if somebody sets both, --with-cups= and --with-cups-include, with-cups-include gets precedence. The problem is only theoretical, I guess but I'd find it better if it were:
if test "x${with_cups}" != x; then
...
elif test "x${with_cups_include}" != x; then
...
fi

and then
if test "x$CUPS_FOUND" = xno; then
  Are the cups headers installed in the default /usr/include location?
  if aix
  ...
  else
  ...
  fi
fi

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PR Review: https://git.openjdk.org/jdk/pull/15100#pullrequestreview-1557168109