Update kernel to builds 6216316 am: 126673ec9a

Change-Id: I66edb782231e16243e0be9ea78e86f6a28e415f2
tree: 2a4b33491eb4b28c5ecca588b23071abd78f60e4
  1. 5.4-arm64/
  2. 5.4-x86_64/
  3. scripts/
  4. Android.bp
  5. OWNERS
  6. TEST_MAPPING