Create arm64 stable host image build script

This is intended for use with Rockchip's RK3399.

This goes through a number of build steps including:
 - Building ARM Trusted Firmware
 - Generating the U-Boot TPL/SPL + miniloader
 - Generating the U-Boot image tree blob
 - Generating the boot environment + boot script
 - Building the kernel + root file system
 - Generating the initial ramdisk
 - Wrapping everything up into a minimized image file

BUG: 141692755
Test: local build and run on rock pi 4b
Change-Id: Ie2dd5a4e76ea8cfc215912f9c44d79367522e883
1 file changed
tree: 8edc62f1c7700046590f048d8eff0e79086c57f2
  1. common/
  2. guest/
  3. host/
  4. tests/
  5. tools/
  6. Android.bp
  7. Android.mk
  8. OWNERS
  9. TEST_MAPPING