Hello,
It seems like this issue is still happening in the latest builds, i've downloaded the following build:
789b47b7bbf1b491811bb7d026c6666cf086eb0b (2017-11-18 12:08:23)
And it still complains about missing libdiscord-rpc.so:
error while loading shared libraries: libdiscord-rpc.so: cannot open shared object file: No such file or directory