By Josh Smith SEOUL (Reuters) -North Korean leader Kim Jong Un called on the country’s military to “bolster up their strength in every way to annihilate the enemy”, state media reported on Friday, as new satellite imagery showed increased preparations for a possible nuclear test. Kim made the remarks during photo sessions with troops, state media broadcasters, and others involved in a massive military parade staged on Monday, which marked the 90th anniversary of the army’s founding. Photos released by state media showed Kim perched on a white horse and wearing a white, military-style tunic wit…