8017578: Hotspot compilation error with latest Studio compiler
Summary: Make the destructor virtual (note more non-compiler hotspot errors occur downstream)
Reviewed-by: kvn, twisti
8019625: Test compiler/8005956/PolynomialRoot.java timeouts on Solaris SPARCs
Summary: Disable the test for SPARC and reduce the number of test iterations
Reviewed-by: kvn