Ignore MacOS .DS_Store files

Change-Id: Ic619aaf88d964f2dd1bf3c78a4be4e728ab2055c
Signed-off-by: Matthias Becker <ma.becker@sap.com>
diff --git a/.gitignore b/.gitignore
index 6b8abe8..62e1b33 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,6 +8,7 @@
 heapdump.*
 core.*
 Snap.*
+.DS_Store
 
 # maven
 /*/*/target/