[8u40] Request to backport 8058679: More bad characters in BigIntegerTest

[Brian Burkhalter]

Please refer to:

* http://mail.openjdk.java.net/pipermail/core-libs-dev/2014-September/028783.html
* http://mail.openjdk.java.net/pipermail/core-libs-dev/2014-September/028784.html

This is a follow up to the incomplete fix for https://bugs.openjdk.java.net/browse/JDK-8058664:

* http://mail.openjdk.java.net/pipermail/jdk8u-dev/2014-September/001996.html

Thanks,

Brian