RFR 9: 8064932: test java/lang/ProcessBuilder/Basic.java: waitFor didn't take long enough

[roger riggs]

Please review this test change to make the wait time in ProcessBuilder/Basic
a bit more lenient.

Webrev:
http://cr.openjdk.java.net/~rriggs/webrev-basic-notenough-8064932/

Issue:
    8064932: java/lang/ProcessBuilder/Basic.java: waitFor didn't take 
long enough

Thanks, Roger