[fix] Cppcheck unknown C/C++ standard #4359
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Cppcheck tool is failing from version 2.15 if "--std=" flag is given an unknown value. For example, "--std=c++0x" is not known, but "--std=c++11" is. Before cppcheck-2.15 the latest known standard version was silently used.
In this patch the unknown standard versions are mapped to the known ones.