Add a Fyne frontend for xC

It is fairly mediocre all around, but also generally usable,
natively covering mobile platforms.

xA/Makefile

@@ -0,0 +1,34 @@
+.POSIX:
+.SUFFIXES:
+.SUFFIXES: .png .svg
+AWK = env LC_ALL=C awk
+
+tools = ../liberty/tools
+outputs = FyneApp.toml xA proto.go xA.png xA-highlighted.png beep.raw
+all: $(outputs)
+
+FyneApp.toml: ../xK-version
+	printf "\
+	[Details]\n\
+	Icon = 'xA.png'\n\
+	Name = 'xA'\n\
+	ID = 'name.janouch.xA'\n\
+	Version = '$$(cat ../xK-version)'\n\
+	Build = 1\n\
+	\n\
+	[LinuxAndBSD]\n\
+	GenericName = 'IRC Client'\n\
+	Categories = ['Network', 'Chat', 'IRCClient']\n" > $@
+.svg.png:
+	rsvg-convert --output=$@ -- $<
+beep.raw:
+	sox -Dr 44100 -c 1 -e signed-integer -b 16 -L -n $@ \
+		synth 0.1 0 25 triangle 800 vol 0.5 fade t 0 -0 0.005 pad 0 0.05
+proto.go: $(tools)/lxdrgen.awk $(tools)/lxdrgen-go.awk ../xC.lxdr
+	$(AWK) -f $(tools)/lxdrgen.awk -f $(tools)/lxdrgen-go.awk \
+		-v PrefixCamel=Relay ../xC.lxdr > $@
+xA: xA.go proto.go ../xK-version xA.png xA-highlighted.png beep.raw
+	go build -ldflags "-X 'main.projectVersion=$$(cat ../xK-version)'" -o $@ \
+		-gcflags=all="-N -l"
+clean:
+	rm -f $(outputs)