build_rootfs.sh: Fix console output with VT enabled am: d1b0c9ade7

Original change: https://android-review.googlesource.com/c/kernel/tests/+/1880155

Change-Id: I3d3ed3dab87137c3c227b32956f335e1d2c9fa00
tree: 637f6861d0077f22111fe54e8aad2da62c77a845
  1. devicetree/
  2. net/
  3. Android.bp
  4. METADATA