wal: Restart tint2 with new color scheme

For history's sake, I'm including how I changed the color scheme of
tint2 with wal. Note that I don't use tint2 anymore since I realized
that what I was trying to do with tint2 can already be achieved much
easier and much more polished with GNOME extensions.

tint2/.config/tint2/wal.sh

@@ -0,0 +1,7 @@
+#!/bin/sh
+
+# Symlink tint2 config
+ln -sf ~/.cache/wal/tint2rc ~/.config/tint2/tint2rc
+
+# Restart tint2 with the new color scheme
+killall -SIGUSR1 tint2

wal/.config/wal/done.sh

@@ -13,3 +13,7 @@ fi
 if [ -e ~/.config/dunst/wal.sh ]; then
   ~/.config/dunst/wal.sh
 fi
+
+if [ -e ~/.config/tint2/wal.sh ]; then
+  ~/.config/tint2/wal.sh
+fi