Add support for FRINT{32,64}{x,z} variants.

Change-Id: Id0c7936968d65ec94f43782cfa00f2702ddc29d3
diff --git a/test/test-api.cc b/test/test-api.cc
index 9b3d55d..aadf577 100644
--- a/test/test-api.cc
+++ b/test/test-api.cc
@@ -393,7 +393,7 @@
       // Armv8.4
       "RCpc (imm), FlagM, USCAT, FHM, DIT, "
       // Armv8.5
-      "BTI, AXFlag, RNG",
+      "BTI, AXFlag, RNG, Frint (bounded)",
       CPUFeatures::All());
 }