aix, test: prolong debugged child process
On AIX, there is a possibility that the child process is done before the parent debugger can connect to it. So prolong the child process by factor of 2.
Fixes: https://github.com/nodejs/node/issues/14897
Checklist
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make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
tests and/or benchmarks are included -
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