Ignore the ctags file

Signed-off-by: Deepika Bhavnani <deepika.bhavnani@arm.com>
Change-Id: Ic78bda00aba0e350095c3dcd59f688f4a27ed1d4
diff --git a/.gitignore b/.gitignore
index 2abfffb..64b389b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -34,3 +34,7 @@
 GRTAGS
 GSYMS
 GTAGS
+
+# Ctags
+tags
+