Support $in_newline am: cd60d79de0

Original change: https://android-review.googlesource.com/c/platform/build/blueprint/+/3413279

Change-Id: I92c28ecea8f9f323b5a0bd80b4e55a3901f7f8d2
Signed-off-by: Automerger Merge Worker <[email protected]>