Add <sys/time.h> needed for struct timeval (#1413)
Add <sys/time.h> needed for struct timeval (#1413)

Signed-off-by: Gaurav Aggarwal <d1bf49c91a2534b91ae70bd4037813434c35a59c@amazon.com>
aws/aws-iot-device-sdk-embedded-C,aws/aws-iot-device-sdk-embedded-C,aws/aws-iot-device-sdk-embedded-C