Added time.h include in redis-cli.
Added time.h include in redis-cli.

redis-cli.c uses the time() function to seed the PRNG, but time.h was
not included. This was not noticed since sys/time.h is included and was
enough in most systems (but not correct). With Ubuntu 12.04 GCC
generates a warning that made us aware of the issue.

JackieXie168/redis,JackieXie168/redis,JackieXie168/redis,JackieXie168/redis