Fix Qt MOC build error
Fix Qt MOC build error

When building the plugin standalone against public library the /usr/include
path must be known to MOC.

dresden-elektronik/deconz-rest-plugin,dresden-elektronik/deconz-rest-plugin,dresden-elektronik/deconz-rest-plugin,dresden-elektronik/deconz-rest-plugin,dresden-elektronik/deconz-rest-plugin