make: add missing echo, affects builds without git
make: add missing echo, affects builds without git

Command used to generate the VERSION string from git had a missing echo, so
would try to execute $(LATEST_RELEASE)-unknown instead of assigning it as a
value.

selepo/svtplay-dl,qnorsten/svtplay-dl,spaam/svtplay-dl,selepo/svtplay-dl,iwconfig/svtplay-dl,olof/svtplay-dl,iwconfig/svtplay-dl,spaam/svtplay-dl,olof/svtplay-dl,dalgr/svtplay-dl,dalgr/svtplay-dl,qnorsten/svtplay-dl