Add buck build soyc to output GWT split point report
The GWT compiler can output a report (or "story of your compile"),
describing the size of the JavaScript and which source classes
contributed to the overall download size. This is useful for
optimizing code splits in Dispatcher, and generally understanding
the impact of linking code together.
Only the "Split Point Report" is created.
The "Compiler Metrics" are not output.
The report is very slow to create, so it is not done by default.
Change-Id: I6ce86d65ee5f3e4bdba573d1f777ccc59767341d
4 files changed
