Add Fossify Clock (#346)

Author: offa

README.md

@@ -192,6 +192,7 @@ A list of **Free** and **Open Source Software** ***(FOSS)*** for **Android** –
 
 * [**Clock**](https://github.com/qw123wh/new-clock-fdroid) <sup>**[[F-Droid](https://f-droid.org/app/com.best.deskclock)]**</sup>
 * [**Clock You**](https://github.com/you-apps/ClockYou) <sup>**[[F-Droid](https://f-droid.org/app/com.bnyro.clock)]**</sup>
+* [**Fossify Clock**](https://github.com/FossifyOrg/Clock) <sup>**[[F-Droid](https://f-droid.org/app/org.fossify.clock)]**</sup>
 * [**Simple Alarm Clock**](https://github.com/yuriykulikov/AlarmClock) <sup>**[[F-Droid](https://f-droid.org/app/com.better.alarm)]**</sup>
 * [**Smart EggTimer**](https://github.com/woheller69/eggtimer) <sup>**[[F-Droid](https://f-droid.org/app/org.woheller69.eggtimer)]**</sup>