net/asterisk22: Fix Endianness detection

After update to 22.6.0 asterisk misbehahave, see
https://github.com/asterisk/asterisk/issues/1536
The patch submitted in https://github.com/asterisk/asterisk/pull/1541
fixes that.

PR: 290318
Approved by: Oleksandr Kryvulia <o.kryvulia@flex-it.com.ua> (maintainer)