Suppress missing system headers and reduce allowed errors to zero

7 jobs for cppcheck_fixes
Status Job ID Name Coverage
  Test
passed #4948
Linux
clang-c++11

00:22:45

passed #4950
Linux
clang-c++98

00:16:24

passed #4953
Linux
cppcheck

00:00:22

passed #4947
Linux
gcc-c++11

00:04:22

passed #4949
Linux
gcc-c++98

00:03:49

passed #4951
Apple
macos-c++11

00:15:14

passed #4952
Apple
macos-c++98

00:08:24