build: imporve optee_example install script.

Signed-off-by: guibing <guibing@nucleisys.com>

Author: matthewgui

Makefile

@@ -471,7 +471,9 @@ optee_example: $(target_gcc) $(optee_example_srcdir) optee_client optee_os
 	$(MAKE) -C $(optee_example_wrkdir) HOST_CROSS_COMPILE=$(CROSS_COMPILE) TEEC_EXPORT=$(optee_client_export) --no-builtin-variables TA_DEV_KIT_DIR=$(optee_os_export) MARCH=$(ISA) MABI=$(ABI)
 	#copy optee example ca,ta,plugin
 	if ls $(optee_example_cadir)/* >/dev/null 2>&1 ;then cp -af $(optee_example_cadir)/* $(buildroot_initramfs_sysroot)/usr/bin; fi
+	mkdir -p $(buildroot_initramfs_sysroot)/lib/optee_armtz && \
 	if ls $(optee_example_tadir)/* >/dev/null 2>&1 ;then cp -af $(optee_example_tadir)/* $(buildroot_initramfs_sysroot)/lib/optee_armtz/; fi
+	mkdir -p $(buildroot_initramfs_sysroot)/usr/lib/tee-supplicant/plugins && \
 	if ls $(optee_example_plugindir)/*.plugin >/dev/null 2>&1 ;then cp -af $(optee_example_plugindir)/*.plugin  $(buildroot_initramfs_sysroot)/usr/lib/tee-supplicant/plugins/; fi
 
 # 3th level optee_benchmark build