i2c-tools: add license information

Signed-off-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com>
Acked-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/i2c-tools/i2c-tools.mk

@@ -7,6 +7,8 @@
 I2C_TOOLS_VERSION = 3.1.0
 I2C_TOOLS_SOURCE = i2c-tools-$(I2C_TOOLS_VERSION).tar.bz2
 I2C_TOOLS_SITE = http://dl.lm-sensors.org/i2c-tools/releases
+I2C_TOOLS_LICENSE = GPLv2+, GPLv2 (py-smbus)
+I2C_TOOLS_LICENSE_FILES = COPYING
 
 define I2C_TOOLS_BUILD_CMDS
  $(MAKE) $(TARGET_CONFIGURE_OPTS) -C $(@D)