Fix sys/linux 64 bit arguments on 32 bit systems

Reverese return values of compat64_arg_pair
Add register alignment to specific arm32 system calls

core/os/os2/file_linux.odin

@@ -80,6 +80,9 @@ _open :: proc(name: string, flags: File_Flags, perm: int) -> (f: ^File, err: Err
 	// terminal would be incredibly rare. This has no effect on files while
 	// allowing us to open serial devices.
 	sys_flags: linux.Open_Flags = {.NOCTTY, .CLOEXEC}
+	when size_of(rawptr) == 4 {
+		sys_flags += {.LARGEFILE}
+	}
 	switch flags & (O_RDONLY|O_WRONLY|O_RDWR) {
 	case O_RDONLY:
 	case O_WRONLY: sys_flags += {.WRONLY}