This change adds new test to assess ctime's functionality.
To be more specific - following use cases are checked:
- Pass time_t value as 0 to check if epoch time is converted
- Pass time_t as max value for 32 bit systems
- Pass time_t as the first value after Y2038 threshold
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Lukasz Majewski