[RISCV] Add negative pre-defined macro test for XAndesVBFHCvt

Author: tclin914

clang/test/Preprocessor/riscv-target-features-andes.c

@@ -4,6 +4,7 @@
 // RUN:   -o - | FileCheck %s
 
 // CHECK-NOT: __riscv_xandesperf {{.*$}}
+// CHECK-NOT: __riscv_xandesvbfhcvt {{.*$}}
 // CHECK-NOT: __riscv_xandesvpackfph {{.*$}}
 // CHECK-NOT: __riscv_xandesvdot {{.*$}}