meta:install: Create GNUPGHOME if nonexistent

This is more of a one-time step to be done when installing, than every
time on login.

meta/install.conf.yaml

@@ -31,6 +31,9 @@
       description: Installing coc.nvim
       stdout: true
       stderr: true
+    -
+      command: ! command -v gpg >/dev/null 2>&1 || mkdir -p ~/.local/share/gnupg
+      description: Creating GNUPGHOME if necessary
 - link:
     ~/.xinitrc:
         path: .xinitrc