UPDATE 4-Donors meet target of $1.5 bln aid for stricken Syrians -UN

* UN leader decries "horrors" in Syria, urges end to war * $1.5 billion pledged aid to cover next six months -Ban * Appeal follows reported massacre of 65 people in Aleppo * Crisis escalating as more flee, war damage extensive (Updates with aid target reached, Ban, Damascenes' comment) KUWAIT, Jan 30 (Reuters) - Donor countries have pledged morethan $1.5 billion to aid Syrians stricken by civil ...