Affecting arm64-really-unpublished-builder-rel and arm64-unpublished-builder-rel.  First failing build https://uberchromegw.corp.google.com/i/internal.client.clank/builders/arm64-really-unpublished-builder-rel/builds/969 .  Regression range https://chromium.googlesource.com/chromium/src.git/+log/b856d1a5c9e4426f51500eebe7dd9c2ad1699fc8..43842c74ece44a3098321f3c2159235d3891c778 . 
 Error log is:

[58984/65473] ACTION //chrome/android:chrome_modern_public_apk__create__package(//build/toolchain/android:android_clang_arm64)
FAILED: gen/chrome/android/chrome_modern_public_apk/chrome_modern_public_apk.apk_intermediates.unfinished.apk 
python ../../build/android/gyp/apkbuilder.py --depfile gen/chrome/android/chrome_modern_public_apk__create__package.d --resource-apk=gen/chrome/android/chrome_modern_public_apk/chrome_modern_public_apk.apk_intermediates.ap_ --output-apk=gen/chrome/android/chrome_modern_public_apk/chrome_modern_public_apk.apk_intermediates.unfinished.apk --assets=@FileArg\(gen/chrome/android/chrome_modern_public_apk.build_config:assets\) --uncompressed-assets=@FileArg\(gen/chrome/android/chrome_modern_public_apk.build_config:uncompressed_assets\) --java-resources=@FileArg\(gen/chrome/android/chrome_modern_public_apk.build_config:java_resources_jars\) --dex-file=gen/chrome/android/chrome_modern_public_apk/classes.dex --android-abi=arm64-v8a --native-libs=\[\"libchromium_android_linker.so\"\] --native-libs=@FileArg\(gen/chrome/android/chrome_modern_public_apk/packed-libs/filelist.json:files\) --uncompress-shared-libraries
Traceback (most recent call last):
  File "../../build/android/gyp/apkbuilder.py", line 320, in <module>
    main(sys.argv[1:])
  File "../../build/android/gyp/apkbuilder.py", line 316, in main
    depfile_deps=depfile_deps)
  File "/b/build/slave/arm64-really-unpublished-builder-rel/build/src/build/android/gyp/util/build_utils.py", line 595, in CallAndWriteDepfileIfStale
    pass_changes=True)
  File "/b/build/slave/arm64-really-unpublished-builder-rel/build/src/build/android/gyp/util/md5_check.py", line 63, in CallAndRecordIfStale
    new_metadata.AddFile(path, _Md5ForPath(path))
  File "/b/build/slave/arm64-really-unpublished-builder-rel/build/src/build/android/gyp/util/md5_check.py", line 381, in _Md5ForPath
    _UpdateMd5ForFile(md5, path)
  File "/b/build/slave/arm64-really-unpublished-builder-rel/build/src/build/android/gyp/util/md5_check.py", line 362, in _UpdateMd5ForFile
    with open(path, 'rb') as infile:
IOError: [Errno 2] No such file or directory: 'libchromium_android_linker.so'