kconfiglib: Update to get choice.direct_dep in
kconfiglib: Update to get choice.direct_dep in

Update Kconfiglib to upstream revision 509e374dfcadb (+ local Zephyr
modifications) to get commit 509e374dfcadb ("Add Choice.direct_dep
field") in. It is used by the upcoming Python menuconfig implementation
when displaying information about choices.

Origin: https://github.com/zephyrproject-rtos/Kconfiglib/tree/zephyr

Signed-off-by: Ulf Magnusson <f650684f780c6b48c0158c4e0f2e27f74aabc755@gmail.com>

zephyrproject-rtos/zephyr,mbolivar/zephyr,zephyriot/zephyr,punitvara/zephyr,finikorg/zephyr,nashif/zephyr,kraj/zephyr,ldts/zephyr,mbolivar/zephyr,Vudentz/zephyr,Vudentz/zephyr,galak/zephyr,zephyriot/zephyr,ldts/zephyr,nashif/zephyr,nashif/zephyr,punitvara/zephyr,nashif/zephyr,finikorg/zephyr,explora26/zephyr,nashif/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr,mbolivar/zephyr,kraj/zephyr,galak/zephyr,zephyriot/zephyr,Vudentz/zephyr,zephyrproject-rtos/zephyr,kraj/zephyr,Vudentz/zephyr,zephyrproject-rtos/zephyr,explora26/zephyr,GiulianoFranchetto/zephyr,mbolivar/zephyr,explora26/zephyr,galak/zephyr,GiulianoFranchetto/zephyr,GiulianoFranchetto/zephyr,zephyriot/zephyr,ldts/zephyr,galak/zephyr,mbolivar/zephyr,galak/zephyr,punitvara/zephyr,finikorg/zephyr,kraj/zephyr,ldts/zephyr,zephyrproject-rtos/zephyr,punitvara/zephyr,punitvara/zephyr,Vudentz/zephyr,explora26/zephyr,GiulianoFranchetto/zephyr,Vudentz/zephyr,kraj/zephyr,ldts/zephyr,explora26/zephyr,GiulianoFranchetto/zephyr,zephyriot/zephyr