Update test result for perror

mysql-test/r/perror.result:
  Add error result for 1186
  Remove the result for the others
mysql-test/t/perror.test:
  As it's only just interesting to see that perror doesn't crash(and as result varies across platforms), send result to /dev/null

mysql-test/r/perror.result

-MySQL error code 150: Foreign key constraint is incorrectly formed
-Is a named type file
-Didn't find key on read or update
+Illegal ndb error code: 1186
+Illegal error code: 1186

mysql-test/t/perror.test

@@ -6,8 +6,8 @@ disable_query_log;
 eval select LENGTH("$MY_PERROR") > 0 as "have_perror";
 enable_query_log;
 
---exec $MY_PERROR 150
---exec $MY_PERROR --silent 120
+--exec $MY_PERROR 150 > /dev/null
+--exec $MY_PERROR --silent 120 > /dev/null
 
 #
 # Bug#16561 Unknown ERROR msg "ERROR 1186 (HY000): Binlog closed" by perror
@@ -16,7 +16,8 @@ enable_query_log;
 # As long there is no error code 1186 defined by NDB
 # we should get a message "Illegal ndb error code: 1186"
 --error 1
---exec $MY_PERROR --ndb 1186
+--exec $MY_PERROR --ndb 1186 2>&1
 
 # As there is an error code defined for 1186, expect error
---exec $MY_PERROR 1186
+--error 1
+--exec $MY_PERROR 1186 2>&1