Add .gitignore to the ansible directory

To avoid including the untarred chroot directory into git

Issue-ID: OOM-1551
Change-Id: I4f760a2a5068a78fb5a05ebb1874544d55a2fc83
Signed-off-by: Petr Ospalý <p.ospaly@partner.samsung.com>
diff --git a/ansible/.gitignore b/ansible/.gitignore
new file mode 100644
index 0000000..5cddc2e
--- /dev/null
+++ b/ansible/.gitignore
@@ -0,0 +1 @@
+ansible_chroot