fit musl lib for arm boards.

Ubiquitous/XiZi/lib/musllib/arch/generic/bits/sem.h

@@ -0,0 +1,14 @@
+struct semid_ds {
+	struct ipc_perm sem_perm;
+	time_t sem_otime;
+	time_t sem_ctime;
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+	unsigned short sem_nsems;
+	char __sem_nsems_pad[sizeof(long)-sizeof(short)];
+#else
+	char __sem_nsems_pad[sizeof(long)-sizeof(short)];
+	unsigned short sem_nsems;
+#endif
+	long __unused3;
+	long __unused4;
+};