This change adds a size reporting module named pw_bloat. The module
uses Bloaty McBloatface to generate size report cards for binaries. It
provides a GN template which defines an action to perform a size diff
on a group of binary targets.
Example output:
simple_bloat
────────────
┌────────────────┬──────────────┬────────┬───────┬───────┐
│ Label │ Segment │ Before │ Delta │ After │
├════════════════┼══════════════┼════════┼═══════┼═══════┤
│ Add a loop │ EXAMPLE CODE │ 429 │ +32 │ 461 │
│ │ EXAMPLE RAM │ 576 │ +8 │ 584 │
├────────────────┼──────────────┼────────┼───────┼───────┤
│ Add a function │ EXAMPLE CODE │ 429 │ +16 │ 445 │
│ │ EXAMPLE RAM │ 576 │ +8 │ 584 │
└────────────────┴──────────────┴────────┴───────┴───────┘
Change-Id: I14b3d383ec450bc6d017bf5d0111e266b0a3c368
