Add path to CMSIS-DSP header in STM32Cube (#469)

Author: caiosignor

builder/frameworks/stm32cube.py

@@ -202,6 +202,7 @@ def build_usb_libs(usb_libs_root):
     CPPPATH=[
         "$PROJECT_SRC_DIR",
         "$PROJECT_INCLUDE_DIR",
+        os.path.join(FRAMEWORK_DIR, "Drivers", "CMSIS", "DSP", "Include"),
         os.path.join(FRAMEWORK_DIR, "Drivers", "CMSIS", "Include"),
         os.path.join(
             FRAMEWORK_DIR,