Fix GNU coding style in gcov.c
* gcov.c (main): Fix GNU coding style.
(output_intermediate_file): Likewise.
(process_file): Likewise.
(generate_results): Likewise.
(release_structures): Likewise.
(create_file_names): Likewise.
(find_source): Likewise.
(read_graph_file): Likewise.
(find_exception_blocks): Likewise.
(canonicalize_name): Likewise.
(make_gcov_file_name): Likewise.
(mangle_name): Likewise.
(accumulate_line_counts): Likewise.
(output_branch_count): Likewise.
(read_line): Likewise.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@239134 138bc75d-0d04-0410-961f-82ee72b054a4