Merge branch 'master' into feature/freertos_static_buffers

* master: (117 commits)
  build system: Add -fno-rtti when compiling C++ code
  FreeRTOS KConfig: Limit tick rate to 1000Hz
  bootloader: Fix accidental tabs introduced in !78
  build system: Print a WARNING if any submodule is out of date
  Fix stack overflow message format
  'make flash' targets: Print serial port when flashing
  lwip/esp32: support iperf
  Add data memory for RMT peripheral
  syscall write: Should return number of bytes written
  Also push relevant tags over
  esp32: add libsmartconfig.a to link libs
  esp32: not link wps
  esp32/lib: update wifi lib to a1e5f8b9
  esp32: remove esp_wps.h
  add smartconfig header files(merge this after updating libsmartconfig.a version v2.6.2)
  esp32/lib: update wifi lib to 3853d7ae
  Add Comments
  Modify spinlock error in periph_ctrl.c
  Define xcoreid offset, add warning in tcb struct wrt the need to also change that define when struct changes
  components/tcpip_adapter: add some comments
  ...

# Conflicts:
#	components/freertos/queue.c
#	components/freertos/tasks.c

components/freertos/include/freertos/FreeRTOSConfig.h

@@ -124,6 +124,16 @@
         abort();                                                        \
         }
 #endif
+
+#if CONFIG_FREERTOS_ASSERT_ON_UNTESTED_FUNCTION
+#include <stdlib.h>
+#include "rom/ets_sys.h"
+#define UNTESTED_FUNCTION() { ets_printf("Untested FreeRTOS function %s\r\n", __FUNCTION__); configASSERT(false); } while(0)
+#else
+#define UNTESTED_FUNCTION()
+#endif
+
+
 #endif /* def __ASSEMBLER__ */
 
 
@@ -265,5 +275,7 @@
 #define configXT_SIMULATOR					0
 
 
+
+
 #endif /* FREERTOS_CONFIG_H */