a better way to init threadlocal prng (#4808)

Co-authored-by: Quan (Andy) Gan <coin2028@hotmail.com>

include/dgl/random.h

@@ -57,7 +57,10 @@ class RandomEngine {
   /**
    * @brief Set the seed of this random number generator
    */
-  void SetSeed(uint32_t seed) { rng_.seed(seed + GetThreadId()); }
+  void SetSeed(uint32_t seed) {
+    std::seed_seq seq{seed, GetThreadId()};
+    rng_.seed(seq);
+  }
 
   /**
    * @brief Generate an arbitrary random 32-bit integer.