Ignore files created by pkg/elasticsearch.sh

When running pkg/elasticsearch.sh the following files are created:

.localrc.password
files/elasticsearch-1.4.2.noarch.rpm
files/elasticsearch-1.4.2.noarch.rpm.sha1.gen
files/elasticsearch-1.4.2.noarch.rpm.sha1.txt


Change-Id: Ie2ab8b7fe72f51cb350e1f46ca97570b84047ac4
Closes-Bug: #1548201

Author: Jin Nan Zhang

.gitignore

@@ -4,13 +4,16 @@
 *.log.[1-9]
 *.pem
 .localrc.auto
+.localrc.password
 .prereqs
 .tox
 .stackenv
 accrc
 doc/files
 doc/build
 files/*.gz
+files/*.rpm
+files/*.rpm.*
 files/*.qcow2
 files/*.img
 files/images