Bug #72273 innochecksum does not work with crc32 algorithm

Description:
The innochecksum utility does not work with crc32 checksum algorithm. It check the old method of checksumming wrong, and will print an error like below：

$./innochecksum --debug /u01/my3928/data/test/sbtest1.ibd
InnoDB offline file checksum utility.

Variables (--variable-name=value)
and boolean options {FALSE|TRUE}  Value (after reading options)
--------------------------------- ----------------------------------------
verbose                           TRUE
debug                             TRUE
count                             FALSE
start-page                        0
end-page                          0
page                              0
file /u01/my3928/data/test/sbtest1.ibd = 9437184 bytes (576 pages)...
InnoChecksum; checking pages in range 0 to 575
page 0: log sequence number: first = 2710716; second = 2710716
page 0: old style: calculated = 1130663741; recorded = 3133506548
Fail;  page 0 invalid (fails old style checksum)

How to repeat:
1. set the global variable innodb_checksum_algorithm to strict_crc32, such as:
root@(none) 07:21:47>show global variables like "innodb_checksum%";
+---------------------------+--------------+
| Variable_name             | Value        |
+---------------------------+--------------+
| innodb_checksum_algorithm | strict_crc32 |
| innodb_checksums          | ON           |
+---------------------------+--------------+
2. insert some rows into an innodb table;
3. shutdown the mysqld;
4. use the innochecksum utility to check the table , you will see the result as above.

Suggested fix:
I think we can use the buf_page_is_corrupted function to judge whether the checksum is right like 5.7, but I am not very sure because I have not compiled a 5.7 version to verify it.

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Duplicate of bug #70344