Move clang-format.el along with tools-extra (bz#1812487)
    
    With the current setup, if you only install clang-tools-extra, the
    package clang-format is not found by Emacs.
    
    A similar change was made for the Python scripts, although I did not
    run in the same situation myself.
    
    v2: Moved additional files at the suggestion of @sergesanspaille
    %{_mandir}/man1/diagtool.1.gz
    %{_bindir}/c-index-test
    Also restored trailing whitespaces in the .spec file