Add new clang and clang-tidy warning patterns

* New "clang-tidy aborted ..." warnings are reported when
  clang-tidy runs for more than TIDY_TIMEOUT seconds.

Test: warn.py --url=http://cs/android --separator='?l=' build.log > warnings.html
Test: warn.py --gencsv build.log > warnings.csv
Change-Id: Iea62b06b2cf78737d7713dabbcf6d9ac8ba23898