[12] JDK-8211841 [testbug] sun/nio/cs/OLD/TestIBMDB.java does not compile (aix)

[Ichiroh Takiguchi]

Hello.
Could you review the fix ?
And please push this to jdk12 if possible.

Bug:    https://bugs.openjdk.java.net/browse/JDK-8211841
Change: http://cr.openjdk.java.net/~itakiguchi/8211841/webrev.00/

I'd like to obtain a sponsor for this issue.

Thanks,
Ichiroh Takiguchi
IBM Japan, Ltd.