Unfortunately Solaris 8 (used to build JDK6) has different
kstat structure vs Solaris 10 (used to build JDK7) so
I have to work around this problem.
Verified with JPRT build and test for jdk6 and jdk7.
Renamed is_niagara1 to is_niagara since it checks for
T family cpus not just T1.
Reduced heap size for test_gamma to -Xmx32m since
64bit VM reserves 1/4 of physical memory by default.
Fixed print format for reserved heap size.
Print compressed oops mode with -XX:+PrintMiscellaneous -XX:+Verbose.
Add check for VIS3.
Use FXTOD and FXTOS on T series and SPARC64
(tested with microbenchmark).