Exclude etc/logging.conf from versioning

Change-Id: I714b65a647d2f39057bcc664bce606373935dfe9
diff --git a/.gitignore b/.gitignore
index c154603..f5f51ab 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,6 +2,7 @@
 ChangeLog
 *.pyc
 etc/tempest.conf
+etc/logging.conf
 include/swift_objects/swift_small
 include/swift_objects/swift_medium
 include/swift_objects/swift_large