google-breakpad: Merge with upstream breakpad r1422

BUG=chromium:453498, chromium:453484
TEST=Tested the following on x86-alex (x86), link (amd64), daisy (arm):
1. `FEATURES=test emerge-${BOARD} google-breakpad`
2. `USE='asan clang' FEATURES=test emerge-${BOARD} google-breakpad`
3. Run the following autotest tests:
   - logging_CrashSender
   - logging_UserCrash