Adding generated factory package files to gitignore.

Change-Id: I3fac307fefacb83250f61cc85a84426632ef87c9

R=sosa@chromium.org,nsanders@chromium.org
BUG=None
TEST=Verified built factory packages stopped showing up in 'git status'.

Review URL: http://codereview.chromium.org/6759012
diff --git a/.gitignore b/.gitignore
index af2b963..2aef682 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,8 @@
 .*.sw*
 *.pyc
+miniomaha.conf
+static/efi.gz
+static/oem.gz
+static/rootfs-release.gz
+static/rootfs-test.gz
+static/state.gz