move phone variables to gammu-related part of yasnd library

lib/yasnd-gammu.c

@@ -2,6 +2,9 @@
 #include "yasnd.h"
 #include "yasnd-log.h"
 
+char* phone_device=NULL; // phone device for gammu, for example: "/dev/ttyACM0"
+char* phone_model=NULL; // gammu phone model, for example: "at"
+char* phone_connection=NULL; // gammu phone connection type, for example: "at"
 GSM_Error error; // structure to store possible gammu errors
 GSM_StateMachine *state_machine=NULL; // structure to interact with mobile phones
 volatile gboolean gammu_shutdown=FALSE; // variable that indicates gammu shutdown