Merge "init: add a copy_per_line built-in command" am: 4544d991f7 am: 0b140bfcf0 am: 008a53ce75

Original change: https://android-review.googlesource.com/c/platform/system/core/+/1504276

Change-Id: I2c844e9c8689557dc076180a9d6b739d9527a4ac