Set time on make (#35)

* Time can get set from makefile

* Added setting make time into simulator

* Added  Hash in settings

* Added default location

* Cuts the Githash to 6 characters in the settings in case the makefile didn't do that already

* bump gossamer commit

* remove automatic timezone setting

* automatic time set: rename MAKEFILE_ to BUILD_ to match gossamer

* Revert "Added default location"

This reverts commit c24f69450fd40472c4f6cebb790a56c3f0d69cb6.

* silence warning

* watch_get_init_date_time: explicitly initialize all fields to 0

---------

Co-authored-by: Joey Castillo <joeycastillo@utexas.edu>

watch-library/shared/watch/watch_rtc.h

@@ -68,6 +68,11 @@ void watch_rtc_set_date_time(rtc_date_time_t date_time);
   */
 rtc_date_time_t watch_rtc_get_date_time(void);
 
+/** @brief Returns the date and time that the watch defaults to when power cycled. Often comes from the Makefile flags.
+  * @return A rtc_date_time_t with the current date and time, with a year value from 0-63 representing 2020-2083.
+  */
+rtc_date_time_t watch_get_init_date_time(void);
+
 /** @brief Registers an alarm callback that will be called when the RTC time matches the target time, as masked
   *        by the provided mask.
   * @param callback The function you wish to have called when the alarm fires. If this value is NULL, the alarm