Add missing exec

Author: knro

drivers.xml

@@ -154,11 +154,11 @@
             <version>1.9</version>
         </device>
         <device label="iOptron CEM26" manufacturer="iOptron">
-            <driver name="iOptronV3"></driver>
+            <driver name="iOptronV3">indi_ioptronv3_telescope</driver>
             <version>1.3</version>
         </device>
         <device label="iOptron GEM28" manufacturer="iOptron">
-            <driver name="iOptronV3"></driver>
+            <driver name="iOptronV3">indi_ioptronv3_telescope</driver>
             <version>1.3</version>
         </device>
         <device label="iOptron CEM40" manufacturer="iOptron">