[Bug gcov-profile/58602] .gcno files not truncated at gcov_close

[laurent.alfonsi at st dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58602

--- Comment #3 from Laurent Aflonsi <laurent.alfonsi at st dot com> ---
Created attachment 31086
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=31086&action=edit
source patch for trunk