8046769: Set T family feature bit on Niagara systems

Reviewed-by: kvn, iveresov

src/os_cpu/linux_sparc/vm/vm_version_linux_sparc.cpp

@@ -55,7 +55,7 @@ int VM_Version::platform_features(int features) {
 
   if (detect_niagara()) {
     NOT_PRODUCT(if (PrintMiscellaneous && Verbose) tty->print_cr("Detected Linux on Niagara");)
-    features = niagara1_m;
+    features = niagara1_m | T_family_m;
   }
 
   return features;