Disable an SB-INTROSPECT test on GENCGC SPARC.
* Test ALLOCATION-INFORMATION.4 is known to be flaky at best on
GENCGC PPC, and has been observed to fail on GENCGC SPARC. Since
it's been marked :FAILS-ON for GENCGC PPC, mark it as failing for
GENCGC SPARC as well.