google-breakpad: Merge with upstream breakpad r942

BUG=none
TEST=Verified the following:
1. emerge google-breadpad for x86-generic, arm-generic and amd64-generic
2. cros_run_unit_tests google-breakpad for x86-generic and amd64-generic
3. Run the following autotest tests on a Cr48:
   - logging_CrashSender
   - logging_UserCrash

Change-Id: I3dc44e5e24b6122647101d77ac33c7cd84e3f149