Makefile: a bit of a hack to get sigs working
Makefile: a bit of a hack to get sigs working

sigs don't work right now because out/Debug doesn't exist initially. So, use a
bit of hack by having all: call Make for the *sigs after the out Makefile
finishes.

kans/birgo,kans/birgo,kans/birgo,kans/birgo,kans/birgo