Add usesninjalogasweightlist option
If weight list is large(more than 100,000 lines), reading the whole list
spends a few seconds(1-3s). It is ignorable in full build, but it might
be considerable in small build or m nothing scenario.
If weight list comes from ninja log, we can just directly read ninja log
data instead of writing weight list from ninja log outside, and read the
weight list. It doesn't spend additional time because ninja log is
loaded by default.
Bug: 271527305
Test: build with new option
Change-Id: I1b4880ce993e5faaa03749b30f62a1236f63fe86
3 files changed
