Update Flashing eMMC instructions
Update Flashing eMMC instructions

Added secondary link to compressed 64GB image
BARCproject/barc,MPC-Berkeley/barc,MPC-Berkeley/barc,BARCproject/barc,MPC-Berkeley/barc,BARCproject/barc,MPC-Berkeley/barc,MPC-Berkeley/barc,BARCproject/barc,BARCproject/barc,MPC-Berkeley/barc,MPC-Berkeley/barc,BARCproject/barc,BARCproject/barc