Use $(libdir) instead of $(libexecdir) as plugindir
Submitted by Marcel Kühlhorn @tux93
Assigned to Natanael Copa @ncopa
Description
Currently the plugin uses $(libexecdir) as plugindir which leads to it not showing up in the Panel Plugin Selection on x86_64 systems
I currently work around this by manually moving it to $(libdir) after building but it should just go there by default.