fix case block indentation for emacs24 (cc-mode 5.32.2) or higher

In emacs24, c-stmt-delim-chars and c-stmt-delim-chars-with-comma are not
needed for vsemi (cc-awk is not set these).
Merge branch 'fix-case-block-indent' of github.com:buzztaiki/Emacs-Groovy-Mode into buzztaiki-fix-case-block-indent
Merge branch 'buzztaiki-fix-case-block-indent'