[ins] Add EKF2 from the PX4 ECL library (#2402)

* [abi] Add timestamp to AGL and BARO_ABS

* [make] Add support for c++0x for all architectures

* [math] Add air density calculation

* [gps] Add horizontal and vertical position accuracy

* [boards] PX4FMU change default baudrate and add SBUS

* [ins] Add EKF2

* [tests] Add Bebop2 with EKF2

* [nps] Fix jsbsim simulator initialisation and GPS accuracy

conf/Makefile.chibios

@@ -74,6 +74,12 @@ else
 $(TARGET).CFLAGS += -DCH_DBG_THREADS_PROFILING=TRUE
 endif
 
+#
+# Add syscalls and c++ new/delete operators
+#
+$(TARGET).srcs += c++.cpp pprz_syscalls.c
+$(TARGET).CXXFLAGS += -fno-sized-deallocation
+
 #
 # General rules
 #
@@ -312,6 +318,9 @@ CPPWARN = -Wall -Wextra
 # List all user C define here, like -D_DEBUG=1
 UDEFS = $($(TARGET).CFLAGS) $(USER_CFLAGS) $(BOARD_CFLAGS)
 
+# List all extra user CPP define here
+UPDEFS = $($(TARGET).CXXFLAGS)
+
 # Define ASM defines here
 UADEFS = $($(TARGET).CFLAGS) $(USER_CFLAGS) $(BOARD_CFLAGS)