Makefile: fix makefile output alignment
Makefile: fix makefile output alignment

In possibly the most anal commit to date for me, add some spaces
so the SCSS rule output lines up with other makefile rules
[endlessm/eos-sdk#3384]

endlessm/eos-knowledge-lib,endlessm/eos-knowledge-lib,endlessm/eos-knowledge-lib,endlessm/eos-knowledge-lib