Run Ninja to build Fuchsia
usage: fx build [--log FILENAME] [-SWITCH...] [zircon/TARGET | TARGET ...] This runs Ninja, usually twice: once for Zircon and once for Fuchsia. With no explicit targets, Zircon Ninja builds its default targets and then Fuchsia Ninja builds its default targets. For each `zircon/TARGET` argument, `TARGET` is passed to Zircon Ninja. For each other `TARGET` argument, `TARGET` is passed to Fuchsia Ninja. If all the target arguments are `zircon/TARGET`, Fuchsia Ninja is not run. optional arguments: --log LOGFILE Print debug information to LOGFILE. Please attach the resulting file when reporting bugs. Other arguments are passed through to Ninja (same switches for both Zircon and Fuchsia). Run `fx build -h` to see Ninja argument details.