Add xch_target_address to farm_funcs.py

[bosonno]

Farming status: Farming
Total chia farmed: 0.0
User transaction fees: 0.0
Block rewards: 0.0
Last height farmed: 0
Plot count: 0
Total size of plots: 0 TiB
Estimated network space: 0 PiB
Expected time to win: 2 months
Reward address: deadbeefdeadbeefdeadbeefdeadbeef
Note: log into your key using 'chia wallet show' to see rewards for each key