set $TERMINAL for i3-sensible-terminal script

rc.xsh

@@ -67,6 +67,8 @@ if os.path.isdir(USER_BIN_PATH):
     $PATH.insert(0, USER_BIN_PATH)
 $PAGER = 'less'
 $EDITOR = 'vim'
+# i3-sensible-terminal
+$TERMINAL = 'termite'
 # required by pinentry-tty when using gpg command:
 $GPG_TTY = $(tty)
 if shutil.which('gpgconf'):