GSI vbmeta.img: set rollback_index to zero

The major purpose of vbmeta.img built on GSI targets (e.g., aosp_arm,
aosp_arm64, etc) is to disable AVB. We should also set the rollback
index to zero, to prevent the device bootloader from updating the
last seen rollback index in the tamper-evident storage.

Bug: 122583908
Test: build aosp_arm64, then `avbtool info_image --image $OUT/vbmeta.img`
Change-Id: I48a49957f8dd3169003b9507fe80e519f301d5b5
1 file changed
tree: 07e0b75a8d975533b8c53090b717cf48a507518b
  1. common/
  2. core/
  3. packaging/
  4. target/
  5. tests/
  6. tools/
  7. .gitignore
  8. buildspec.mk.default
  9. Changes.md
  10. CleanSpec.mk
  11. envsetup.sh
  12. help.sh
  13. navbar.md
  14. OWNERS
  15. README.md
  16. tapasHelp.sh
  17. Usage.txt
README.md

Android Make Build System

This is the Makefile-based portion of the Android Build System.

For documentation on how to run a build, see Usage.txt

For a list of behavioral changes useful for Android.mk writers see Changes.md

For an outdated reference on Android.mk files, see build-system.html. Our Android.mk files look similar, but are entirely different from the Android.mk files used by the NDK build system. When searching for documentation elsewhere, ensure that it is for the platform build system -- most are not.

This Makefile-based system is in the process of being replaced with Soong, a new build system written in Go. During the transition, all of these makefiles are read by Kati, and generate a ninja file instead of being executed directly. That's combined with a ninja file read by Soong so that the build graph of the two systems can be combined and run as one.