audio: update references to support prebuilt kernel build

Updating kernel references to LOCAL_ADDITIONAL_DEPENDENCIES and
BOARD_KERNEL_HEADER_DIR

Change-Id: I94fedd691dba7878b25c0ddbca0c87e62cbc856d
7 files changed
tree: 35b9ff8d4d6f15d413f693622afdf0d7ff273f5a
  1. hal/
  2. legacy/
  3. msm8909/
  4. post_proc/
  5. visualizer/
  6. voice_processing/
  7. Android.mk