FunctionChecker should check the bodies of FunctionDecl too, to catch
Functions not tied to classes. Don't issues warnings from FunctionChecker
since this info is written to a file. Have clang geneerate plist files
when running ClassDumper,FunctionDumper and FunctionChecker.
Merge pull request #4104 from gartung/clang-fix-function-checker

Check the bodies of FunctionDecl's too.