xA: add a "generate" target to the Makefile

So that Fyne tools can be run without building the default binary.

xA/Makefile

@@ -4,8 +4,10 @@
 AWK = env LC_ALL=C awk
 
 tools = ../liberty/tools
-outputs = FyneApp.toml xA proto.go xA.png xA-highlighted.png beep.raw
+generated = FyneApp.toml xA.png xA-highlighted.png beep.raw proto.go
+outputs = xA $(generated)
 all: $(outputs)
+generate: $(generated)
 
 FyneApp.toml: ../xK-version
 	printf "\
@@ -27,7 +29,7 @@ beep.raw:
 proto.go: $(tools)/lxdrgen.awk $(tools)/lxdrgen-go.awk ../xC.lxdr
 	$(AWK) -f $(tools)/lxdrgen.awk -f $(tools)/lxdrgen-go.awk \
 		-v PrefixCamel=Relay ../xC.lxdr > $@
-xA: xA.go proto.go ../xK-version xA.png xA-highlighted.png beep.raw
+xA: xA.go ../xK-version $(generated)
 	go build -ldflags "-X 'main.projectVersion=$$(cat ../xK-version)'" -o $@ \
 		-gcflags=all="-N -l"
 clean: