MODES: Add new ArduPilot flight modes to pymavlink

Several new modes have been introduced to the various vehicles supported
by ArduPilot since the solo was created.  This patch adds all those new
flight modes to the enumerations in this older version of pymavlink.
For ArduCopter, this adds support for the following modes:
- Throw mode
- ADS-B Avoid (not a user mode)
- Guided with no GPS
- Smart RTL

pymavlink/mavutil.py

@@ -1282,8 +1282,14 @@ def mode_string_v09(msg):
     12 : 'LOITER',
     14 : 'LAND',
     15 : 'GUIDED',
-    16 : 'INITIALISING'
+    16 : 'INITIALISING',
+    17 : 'QSTABILIZE',
+    18 : 'QHOVER',
+    19 : 'QLOITER',
+    20 : 'QLAND',
+    21 : 'QRTL'
     }
+
 mode_mapping_acm = {
     0 : 'STABILIZE',
     1 : 'ACRO',
@@ -1301,15 +1307,21 @@ def mode_string_v09(msg):
     14 : 'FLIP',
     15 : 'AUTOTUNE',
     16 : 'POSHOLD',
-    17 : 'BRAKE'
+    17 : 'BRAKE',
+    18 : 'THROW',
+    19 : 'AVOID_ADSB',
+    20 : 'GUIDED_NOGPS',
+    21 : 'SMART_RTL'
     }
+
 mode_mapping_rover = {
     0 : 'MANUAL',
     2 : 'LEARNING',
     3 : 'STEERING',
     4 : 'HOLD',
     10 : 'AUTO',
     11 : 'RTL',
+    12 : 'SMART_RTL',
     15 : 'GUIDED',
     16 : 'INITIALISING'
     }
@@ -1329,7 +1341,6 @@ def mode_string_v09(msg):
     3 : 'AUTO'
     }
 
-
 def mode_mapping_byname(mav_type):
     '''return dictionary mapping mode names to numbers, or None if unknown'''
     map = None