Add build-root/*.rpm to .gitignore

Change-Id: I88398b5e538271efa4657851bf53c9b76a56b432
Signed-off-by: Ed Warnicke <eaw@cisco.com>
diff --git a/.gitignore b/.gitignore
index b2e2c62..5d1a597 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,6 +8,7 @@
 /build-root/path_setup
 /build-root/build-config.mk
 /build-root/*.deb
+/build-root/*.rpm
 /build-root/*.changes
 /build-config.mk
 /dpdk/*.tar.gz