Add support for loongarch

[wuruilong01]

Some architectures do not support the fstat system call, such as loongarch. thus causing a compilation error, with a link to the exact cause of the error as follows:https://buildd.debian.org/status/fetch.php?pkg=usbguard&arch=loong64&ver=1.1.3%2Bds-1&stamp=1718074519&raw=0