google-breakpad: bump to version r1373

This version adds support for installing important header files to
<staging>/usr/include/breakpad. It's no longer necessary to include the
whole breakpad source tree when building applications using libbreakpad.a.

Signed-off-by: Frank Hunleth <fhunleth@troodon-software.com>
Reviewed-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>