Bug #32625: Make test type_bit_innodb more robust

Since there is more than one duplicate value in the table, when adding the
unique index it is not deterministic which value will be reported as causing a
problem.  Replace the reported value with '' so that it doesn't affect the
results.

mysql-test/t/type_bit_innodb.test

@@ -40,7 +40,9 @@ drop table t1;
 create table t1 (a bit) engine=innodb;
 insert into t1 values (b'0'), (b'1'), (b'000'), (b'100'), (b'001');
 select hex(a) from t1;
---error 1062
+# It is not deterministic which duplicate will be seen first
+--replace_regex /(.*Duplicate entry )'.*'( for key.*)/\1''\2/
+--error ER_DUP_ENTRY
 alter table t1 add unique (a);
 drop table t1;