tools: add ledumon and ledhwbmon packages

ledumon:
This program creates a new userspace LED class device and monitors it.
For this it es using the kmod-leds-uled.ko kernel module.

ledhwbmon:
This program monitors LED brightness level changes having its origin
in hardware/firmware, i.e. outside of kernel control.

Signed-off-by: Florian Eckert <fe@dev.tdt.de>

target/sdk/Makefile

@@ -86,6 +86,7 @@ KERNEL_FILES := $(patsubst $(TOPDIR)/%,%,$(wildcard $(addprefix $(LINUX_DIR)/,$(
 #
 USERSPACE_UTILS_FILES := \
 	tools/build \
+	tools/leds \
 	tools/power/cpupower \
 	tools/scripts \
 	tools/spi \