std.os.linux: Fix mmap() syscall invocation for s390x.

The s390x mmap() syscall existed before Linux supported syscalls with 5+
parameters, so it takes a single pointer to an array of arguments instead.
cd6795fc06Alex Rønne Petersen committed on 10/3/2024, 10:26:53 PMparent07c9435
2 files changedLine totals unavailable