Integrate phosphor with breakpad

The idea being to perform a binary dump (ie. as-is) of phosphor's internal buffer when breakpad runs. This would allow for greater detail in what kv engine has been up to recently.

In theory breakpad already grabs the memory map of the process which means we don't need to explicitly save category/event/argument names - we just need their address and we can work it out later. The TPI is currently implemented as a local-static variable which means it's probably not constructed until runtime therefore we would either need to manually dump all the TPIs or work out a way to 'force' them to be available at compile-time (likely via constexpr).