Add extra include path for USB CDC

Signed-off-by: fpr <fabien.perroquin@wi6labs.com>

Author: fpistm

platform.txt

@@ -10,6 +10,7 @@ version=1.0.0
 # STM compile variables
 # ----------------------
 compiler.stm.extra_include="-I{build.source.path}" "-I{build.core.path}/avr" "-I{build.core.path}/stm32" "-I{build.system.path}/Drivers/{build.series}_HAL_Driver/Inc/" "-I{build.system.path}/Drivers/{build.series}_HAL_Driver/Src/" "-I{build.system.path}/{build.series}/" "-I{build.variant.path}/usb" "-I{build.variant.path}/Ethernet" "-I{build.system.path}/Middlewares/ST/STM32_USB_Device_Library/Core/Inc" "-I{build.system.path}/Middlewares/ST/STM32_USB_Device_Library/Core/Src"
+compiler.stm.extra_include="-I{build.core.path}/avr" "-I{build.core.path}/stm32" "-I{build.system.path}/Drivers/{build.series}_HAL_Driver/Inc/" "-I{build.system.path}/Drivers/{build.series}_HAL_Driver/Src/" "-I{build.system.path}/{build.series}/" "-I{build.variant.path}/usb" "-I{build.variant.path}/Ethernet" "-I{build.system.path}/Middlewares/ST/STM32_USB_Device_Library/Core/Inc" "-I{build.system.path}/Middlewares/ST/STM32_USB_Device_Library/Core/Src" "-I{build.system.path}/Middlewares/ST/STM32_USB_Device_Library/Class/CDC/Src" "-I{build.system.path}/Middlewares/ST/STM32_USB_Device_Library/Class/CDC/Inc"
 
 # "-I{build.system.path}/Drivers/BSP/Components" "-I{build.system.path}/Middlewares/Third_Party/FatFs/src"  "-I{build.system.path}/Middlewares/ST/STM32_USB_Device_Library/Core/Src" "-I{build.system.path}/Middlewares/ST/STM32_USB_Device_Library/Class/HID/Inc"