For coverage testing use exit() instead of _exit() when termiating saving children.

src/redis.h

@@ -828,6 +828,7 @@ long long ustime(void);
 long long mstime(void);
 void getRandomHexChars(char *p, unsigned int len);
 uint64_t crc64(const unsigned char *s, uint64_t l);
+void exitFromChild(int retcode);
 
 /* networking.c -- Networking and Client related operations */
 redisClient *createClient(int fd);