Once we have done all the changes, we can build the qcow2 image using the following command:
$ make qcow2_img USE_SQUASHFS=0...make_ext4fs -T -1 -S out/target/product/x86emu/root/file_contexts -L system -l 1342177280 -a system out/target/product/x86emu/obj/PACKAGING/systemimage_intermediates/system.img out/target/product/x86emu/system out/target/product/x86emu/systemCreating filesystem with parameters: Size: 1342177280 Block size: 4096 Blocks per group: 32768 Inodes per group: 8192 Inode size: 256 Journal blocks: 5120 Label: system Blocks: 327680 Block groups: 10 Reserved block group size: 79Created filesystem with 2122/81920 inodes and 178910/327680 blocksInstall system fs image: out/target/product/x86emu/system.img ...