Filter-out irrelevant command-line options in CommonOptionsParser.

Summary:
Leave only -help, -version and options from the specified category.
Updated clang-check and clang-tidy. As clang-tidy is in a separate repository,
here's the diff:

  Index: tools/extra/clang-tidy/tool/ClangTidyMain.cpp
  ===================================================================
  --- tools/extra/clang-tidy/tool/ClangTidyMain.cpp       (revision 197024)
  +++ tools/extra/clang-tidy/tool/ClangTidyMain.cpp       (working copy)
  @@ -39,7 +39,7 @@
   // FIXME: Add option to list name/description of all checks.

   int main(int argc, const char **argv) {
  -  CommonOptionsParser OptionsParser(argc, argv);
  +  CommonOptionsParser OptionsParser(argc, argv, ClangTidyCategory);

     SmallVector<clang::tidy::ClangTidyError, 16> Errors;
     clang::tidy::runClangTidy(Checks, OptionsParser.getCompilations(),

Reviewers: djasper, klimek

Reviewed By: djasper

CC: cfe-commits, revane, klimek

Differential Revision: http://llvm-reviews.chandlerc.com/D2379