8189619: [aix, but changes generated-configure.sh] OpenJDK local disk check not working on AIX

[Thomas Stüfe]

Hi all,

May I have a review please for this tiny fix. Fixes the warning checking if
we build on a local disk.

Bug: https://bugs.openjdk.java.net/browse/JDK-8189619
Webrev:
http://cr.openjdk.java.net/~stuefe/webrevs/8189619-openjdk-local-disk-check-broken-on-aix/webrev.00/webrev/

Basically, df -l does not work and has to be substituted with df -T local.
Thanks to Stewart X Addison from the AdoptOpenJDK project for figuring this
out.

I checked the build on linux and AIX, the latter with newer and older AIX
versions. At least on newer AIX versions the local build check works
correctly. On older versions we still get a misleading warning. There, we
may continue to ignore it or just switch it off if it is too annoying.

Thank you,

Kind Regards, Thomas