Move .art.rel data to a section in .art, part 2.

And change the encoding to reduce the size of the data.
Keep the checksum in the .art.rel file, it shall be removed
later together with patchoat.

Boot image sizes for aosp_taimen-userdebug:
  - before:
    arm/boot*.art: 9216000
    arm/boot*.art.rel: 700767
    arm64/boot*.art: 11399168
    arm64/boot*.art.rel: 700808
    oat/arm64/services.art: 192512
  - after:
    arm/boot*.art: 9499351 (+276.7KiB)
    arm/boot*.art.rel: 480 (-683.9KiB)
    arm64/boot*.art: 11750203 (+342.8KiB)
    arm64/boot*.art.rel: 480 (-683.9KiB)
    oat/arm64/services.art: 202466 (+9.7KiB)
Note that the new section is currently uncompressed in the
boot image but we have the ability to compress it in the
future using the same compression as the heap data.

The extra data we now encode in app images is unused so far
but it shall permit fast in-memory patching without looking
at object types.

Test: m test-art-host-gtest
Test: testrunner.py --host --optimizing
Test: Pixel 2 XL boots.
Test: testrunner.py --target --optimizing
Bug: 77856493
Change-Id: I20c9bed9797ce0f23f39c2fb0d64320b457e18d4

0 files changed, 0 insertions, 0 deletions