!44 srand设置随机数种子的实现存在问题

Merge pull request !44 from zhangfanfan2/OpenHarmony_1.0.1_release

kernel/src/prng/rand.c

 #include <stdlib.h>
 #include <stdint.h>
 
-static uint64_t seed;
-
 void srand(unsigned s)
 {
-    return srandom(seed);
+    return srandom(s);
 }
 
 int rand(void)