lib/oelite: Support layer specific configuration files
lib/oelite: Support layer specific configuration files

All metadata layers can include a conf/layer.conf file, which will be
parsed together with all the recipes in that layer.

Whenever any conf/layer.conf file is changed, all recipes will be reparsed.

Signed-off-by: Esben Haabendal <c5ba3f1141bb30a64dd6c7e6726a53a85adc9442@prevas.dk>

sknsean/core,hundeboll/core,sknsean/core,hundeboll/core,diorcety/oe-lite-core,diorcety/oe-lite-core,sknsean/core,hundeboll/core,sknsean/core,sknsean/core,hundeboll/core