gitignore: build/external/downloads

Change-Id: I041764a5546352086aa9803e4bbeb9dff5f8d69a
Signed-off-by: Florin Coras <fcoras@cisco.com>
diff --git a/.gitignore b/.gitignore
index b11564e..63f02fa 100644
--- a/.gitignore
+++ b/.gitignore
@@ -25,6 +25,7 @@
 /build/external/*.tar.xz
 /build/external/vpp-*.deb
 /build/external/vpp-*.changes
+/build/external/downloads/
 /path_setup
 /tools/
 # start autotools ignore
@@ -103,4 +104,4 @@
 /src/scripts/vppctl-cmd-list
 
 # No core files
-**/core
\ No newline at end of file
+**/core