The tmpshmcstat file is generated with kselftest run but was not
ignored, leading to it appearing as untracked in git status.
Add it to .gitignore to silence the warning.

Signed-off-by: Madhur Kumar <madhurkumar004@gmail.com>
---
 tools/testing/selftests/cachestat/.gitignore | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/testing/selftests/cachestat/.gitignore b/tools/testing/selftests/cachestat/.gitignore
index d6c30b43a4bb..abbb13b6e96b 100644
--- a/tools/testing/selftests/cachestat/.gitignore
+++ b/tools/testing/selftests/cachestat/.gitignore
@@ -1,2 +1,3 @@
 # SPDX-License-Identifier: GPL-2.0-only
 test_cachestat
+tmpshmcstat
-- 
2.51.0