[8u20] 8032410: compiler/uncommontrap/TestStackBangRbp.java times out on Solaris-Sparc V9

[Roland Westrelin]

8u20 backport request. The change was pushed to jdk9 almost 2.5 months ago and testing hasn’t shown any problem. I was asked to backport this because it fixes an issue reported by a customer (https://bugs.openjdk.java.net/browse/JDK-8035399)

The change applies cleanly to 8u.
https://bugs.openjdk.java.net/browse/JDK-8032410
http://hg.openjdk.java.net/jdk9/hs-comp/hotspot/rev/cfa802bad1d8

Roland.