std.cfg: configure standard types
CheckIO: Handle library types
Fix clang and coverity warnings
Libary: Fixed gcc warning -Wmissing-field-initializers
Revert my previous fix 28763fa020988ec938dae3d47c10be95c87de90e and suppress gcc false positive warnings.
ValueFlow: Fixed 'function call => calculation' value flow
travis: replace kernel check with clang check.

Check clang instead of kernel, which is a lot faster.
Make clang check failure fatal to the build.
travis: run test_matchcompiler.py
travis: move CHECK_INTERNAL check up, remove "SRCDIR=build VERIFY=1" job in favor of "MAKEFLAGS="HAVE_RULES=yes" SRCDIR=build VERIFY=1"
travis: add -DCHECK_INTERNAL to the VERIFY=1 job to automatically fetch issues like #5869 via travis
travis: run cppcheck with --exception-handling where it matters, update clang repo hash.