Add README for bootstrap/jenkins

Change-Id: I7b3691ddfd5bde8898e25654f19fa7d50ef8e668
Signed-off-by: Gary Wu <gary.i.wu@huawei.com>
diff --git a/.gitignore b/.gitignore
index 99ddf32..75d4125 100644
--- a/.gitignore
+++ b/.gitignore
@@ -14,3 +14,6 @@
 *.zip
 *.tar
 *.gz
+*.log
+.vagrant
+*~