i2c-tools: udated to version 3.1.1

3.1.0 is dated 2011-12-04.
3.1.1 is from 2014-02-20 and has quite a few enhancements.

Signed-off-by: oli vogt <oli.vogt.pub01@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/i2c-tools/i2c-tools.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-I2C_TOOLS_VERSION = 3.1.0
+I2C_TOOLS_VERSION = 3.1.1
 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)