message: fix for generic_m4 build. this flag got dropped as part of the cleanup.
diff: @@ -8,6 +8,7 @@ ifeq ($(TARGET), cortex_m_gcc_generic)
  PLATFORM_FLAGS = \
  -DTF_LITE_MCU_DEBUG_LOG \
  + -Wno-type-limits \
  -funsigned-char \
  -mcpu=cortex-m4 \
  -mfpu=fpv4-sp-d16 \
  