SITL: add GPS2_GLITCH parameter

libraries/SITL/SITL.cpp

@@ -89,6 +89,7 @@ const AP_Param::GroupInfo SITL::var_info[] = {
     AP_GROUPINFO("FLOW_POS",      56, SITL,  optflow_pos_offset, 0),
     AP_GROUPINFO("ACC2_BIAS",     57, SITL,  accel2_bias, 0),
     AP_GROUPINFO("GPS_NOISE",     58, SITL,  gps_noise, 0),
+    AP_GROUPINFO("GP2_GLITCH",    59, SITL,  gps2_glitch,  0),
     AP_GROUPEND
 };
 

libraries/SITL/SITL.h

@@ -97,7 +97,8 @@ public:
     AP_Int8  gps_type;    // see enum GPSType
     AP_Float gps_byteloss;// byte loss as a percent
     AP_Int8  gps_numsats; // number of visible satellites
-    AP_Vector3f  gps_glitch;  // glitch offsets in lat, lon and altitude
+    AP_Vector3f gps_glitch;  // glitch offsets in lat, lon and altitude
+    AP_Vector3f gps2_glitch; // glitch offsets in lat, lon and altitude for 2nd GPS
     AP_Int8  gps_hertz;   // GPS update rate in Hz
     AP_Float batt_voltage; // battery voltage base
     AP_Float accel_fail;  // accelerometer failure value