set required automake version to 1.11.2
set required automake version to 1.11.2

fixes #22 and #20

Yubico/yubikey-personalization-dpkg,Yubico/yubikey-personalization,Yubico/yubikey-personalization,eworm-de/yubikey-personalization,Yubico/yubikey-personalization-dpkg,eworm-de/yubikey-personalization,dmitriykuptsov/yubikey-personalization,eworm-de/yubikey-personalization,dmitriykuptsov/yubikey-personalization,Yubico/yubikey-personalization-dpkg,dmitriykuptsov/yubikey-personalization