Fix build errors (#5436)

* Use sorted to fix python3 build error

* Add drv_hrt.h include to Bebop df wrappers

Tools/px4params/srcparser.py

@@ -129,8 +129,7 @@ class Parameter(object):
         Return list of existing bitmask codes in convenient order
         """
         keys = self.bitmask.keys()
-        keys.sort(key=float)
-        return keys
+        return sorted(keys, key=float)
 
     def GetBitmaskBit(self, index):
         """

src/platforms/posix/drivers/df_ak8963_wrapper/df_ak8963_wrapper.cpp

@@ -53,6 +53,7 @@
 #include <systemlib/err.h>
 
 #include <drivers/drv_mag.h>
+#include <drivers/drv_hrt.h>
 
 #include <uORB/topics/parameter_update.h>
 

src/platforms/posix/drivers/df_ms5607_wrapper/df_ms5607_wrapper.cpp

@@ -53,6 +53,7 @@
 #include <systemlib/err.h>
 
 #include <drivers/drv_baro.h>
+#include <drivers/drv_hrt.h>
 
 #include <board_config.h>