sorry, but i can't help, because i work only with x86, even if i found the libil2cc.so offset from my x86 version (android x86) it would be useless for you, as it is another architecture. 
	and I use the google translator, my english is terrible which makes it difficult to understand what i speak. 
	but when searching for offset searches which is nothing more and nothing less than HEX editor, just try to do AoB (array of Byte) 
	finding what you wanted, you find your offset. 
	of course it may seem rude not to detail further, but you should go after more knowledge, and you can find videos here on the forum, all ready and chewed for you XD