[Bug gcov-profile/95332] gcov-tool merge："not a gcov data file"

[dongjianqiang2 at huawei dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95332

--- Comment #3 from John Dong <dongjianqiang2 at huawei dot com> ---
Created attachment 48613
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=48613&action=edit
a patch for gcov-tool modified.