update icons submodule - electrum - Electrum Bitcoin wallet

commit 649f8414a93242821cfd11eda10235b511c965c6
parent d0a1bae68f1942a4c53b99a17312224db0611295
Author: ThomasV <thomasv@electrum.org>
Date:   Fri, 21 Dec 2018 22:32:57 +0100

update icons submodule

	electrum Electrum Bitcoin wallet
	git clone https://git.parazyd.org/electrum
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