Add native RPi2 build config

cmake/configs/posix_rpi2_default.cmake

@@ -0,0 +1,28 @@
+include(posix/px4_impl_posix)
+
+set(CMAKE_TOOLCHAIN_FILE ${CMAKE_SOURCE_DIR}/cmake/toolchains/Toolchain-native.cmake)
+
+set(config_module_list
+	drivers/device
+
+	systemcmds/param
+	systemcmds/ver
+
+	modules/mavlink
+
+	modules/param
+	modules/systemlib
+	modules/uORB
+	modules/dataman
+
+	lib/mathlib
+	lib/mathlib/math/filter
+	lib/geo
+	lib/geo_lookup
+	lib/conversion
+
+	platforms/common
+	platforms/posix/px4_layer
+	platforms/posix/work_queue
+
+)