[minor] Added Cscope to .gitignore

Added CScope index files to .gitignore

Signed-off-by: Omer Shapira <omer.shapira@gmail.com>
diff --git a/.gitignore b/.gitignore
index ee2cd46..39cdc4e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -54,4 +54,5 @@
 /GSYMS
 /GTAGS
 /TAGS
+/cscope*.out
 /tags