Update kernel to builds 6487909 am: a7798b885b am: 00f39961f6 am: 59e6f5ce40

Change-Id: Ie4991f73c30ad90e1799f708a0cf98b5e4e16bec
tree: 08256a51b4bcc3829b08c79296d4eb29dec00976
  1. 5.4-arm64/
  2. 5.4-x86_64/
  3. scripts/
  4. Android.bp
  5. METADATA
  6. OWNERS
  7. TEST_MAPPING