Rollback to previous toolchain (espressif#894)

Author: ivankravets

tools/platformio-build.py

@@ -48,7 +48,7 @@
  "-Wno-error=unused-function",
  "-Wno-unused-parameter",
  "-Wno-sign-compare",
- "-fstack-protector"
+#  "-fstack-protector"
  ],
 
  CPPPATH=[
@@ -129,7 +129,8 @@ def _get_board_flash_mode(env):
  "-T", "esp32.rom.ld",
  "-T", "esp32.peripherals.ld",
  "-T", "esp32.rom.spiram_incompatible_fns.ld",
- "-u", "ld_include_panic_highint_hdl"
+ "-u", "ld_include_panic_highint_hdl",
+ "-u", "__cxa_guard_dummy"
  ],
 
  UPLOADERFLAGS=[