Adding a way to clean dead build artifacts that have an entry in the build log,
but are no longer produced by the current manifest. For now adding a dedicated
"-t cleandead" option, since it should be run after reading the log; ideally
it should be part of the build config and done before to start looking for
dirty targets so that an incremental build would produce the same end result
as a clean build from scratch. But since I am not 100% sure to understand the
comment in the NinjaMain::isPathDead(), I opted to make it a tool for now to
avoid impacting users who want to keep those files.
The option name "cleandead" was selected insteadof something like "reap" to
keep the "clean" prefix.
4 files changed
