aio-dio-eof-race should be ignored by git

src/aio-dio-regress/aio-dio-eof-race is a binary file built by make. So it should not be tracked by git.

===============================================================================

$ make clean
...
$ git status
On branch sat-bugfixes
nothing to commit, working directory clean
$ make
...
$ git status
On branch sat-bugfixes
Untracked files:
  (use "git add <file>..." to include in what will be committed)

src/aio-dio-regress/aio-dio-eof-race
===============================================================================

---
 .gitignore | 1 +
 1 file changed, 1 insertion(+)

index 5dc4f69..a6f47d3 100644
@@ -113,6 +113,7 @@
 /src/aio-dio-regress/aio-io-setup-with-nonwritable-context-pointer
 /src/aio-dio-regress/aio-last-ref-held-by-io
 /src/aio-dio-regress/aiodio_sparse2
+/src/aio-dio-regress/aio-dio-eof-race
 /src/cloner
 /src/renameat2
 /src/t_rename_overwrite

2.7.0.rc3

Looks good,