gracefully handle status check failure on ubuntu

salt/common/tools/sbin/so-common-status-check

@@ -47,10 +47,14 @@ def check_for_fps():
             fps = 1
     except FileNotFoundError:
         fn = '/proc/sys/crypto/' + feat_full + '_enabled'
-        with open(fn, 'r') as f:
-            contents = f.read()
-            if '1' in contents:
-                fps = 1
+        try:
+          with open(fn, 'r') as f:
+              contents = f.read()
+              if '1' in contents:
+                  fps = 1
+        except:
+          # Unknown, so assume 0
+          fps = 0
 
     with open('/opt/so/log/sostatus/lks_enabled', 'w') as f:
        f.write(str(fps))