RFR (XS): 8227582: runtime/TLS/testtls.sh fails on x86_32

[Jiangli Zhou]

Please review the following test change to disable the negative test
case for the glibc TLS issue. As there are potentially different
failure modes, the negative test case is not completely suitable for
regular testing. For example, a hang could potentially cause timeout
failure.

webrev: http://cr.openjdk.java.net/~jiangli/8227582/webrev.00/
bug: https://bugs.openjdk.java.net/browse/JDK-8227582

Best Regards,
Jiangli