Fix I option

Fix I option

Remove -a -A install options

fix

Update build.sh qemu in /run/

Add checks for virtual environment (chroot)

Add writing uboot to emmc sdmmc manually (for nvme boot)

add linux-firmware-brcm43752 package for armsom-sige7

fix dtbos path

add m7 wifi

fix

Update build.sh more stable mountdev bootdev

Drop dd-ing zeros before format

Cleanup usage mountpoint

Update README.md