conf: add cpu check attribute to ABI check

Different check values are not ABI compatible. For example
if on migration we change 'full' to 'partial' then guest cpu
on destination can be different.
Reviewed-by: NJiri Denemark <jdenemar@redhat.com>
Signed-off-by: NNikolay Shirokovskiy <nshirokovskiy@virtuozzo.com>

src/conf/cpu_conf.c

@@ -894,6 +894,13 @@ virCPUDefIsEqual(virCPUDefPtr src,
         goto cleanup;
     }
 
+    if (src->check != dst->check) {
+        MISMATCH(_("Target CPU check %s does not match source %s"),
+                 virCPUCheckTypeToString(dst->check),
+                 virCPUCheckTypeToString(src->check));
+        goto cleanup;
+    }
+
     if (src->arch != dst->arch) {
         MISMATCH(_("Target CPU arch %s does not match source %s"),
                  virArchToString(dst->arch),