Ignore macOS .DS_Store files

Change-Id: I6f73c3e968cb3f7a136a216dee0e82b0d6b21281
Signed-off-by: Matthias Becker <ma.becker@sap.com>
diff --git a/.gitignore b/.gitignore
index 98a5e58..60c3051 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,4 +9,4 @@
 core.*

 Snap.*

 target/

-

+.DS_Store