hikey_debian: Delete linux package build files on linux-clean

Otherwise they accumulate in $(ROOT)

Signed-off-by: Victor Chong <victor.chong@linaro.org>
Acked-by: Jerome Forissier <jerome.forissier@linaro.org>

hikey_debian.mk

@@ -196,6 +196,7 @@ LINUX_CLEAN_COMMON_FLAGS += ARCH=arm64
 
 .PHONY: linux-clean
 linux-clean: linux-clean-common
+	rm -f $(ROOT)/linux-*optee*.*
 
 LINUX_CLEANER_COMMON_FLAGS += ARCH=arm64