rename vpp-dpdk-dev to vpp-ext-deps

We need to have new tenants in the development package.
This is first of series of patches which will allow us to have multiple
external libs and tools packaged for developer's convenience.

Change-Id: I884bd75fba96005bbf8cea92774682b2228e0e22
Signed-off-by: Damjan Marion <damarion@cisco.com>
diff --git a/.gitignore b/.gitignore
index 7023f7b..1885a85 100644
--- a/.gitignore
+++ b/.gitignore
@@ -21,10 +21,10 @@
 /build-root/vapi_test/
 /build-root/vom_test/
 /build-config.mk
-/dpdk/*.tar.gz
-/dpdk/*.tar.xz
-/dpdk/vpp-dpdk*.deb
-/dpdk/vpp-dpdk*.changes
+/build/external/*.tar.gz
+/build/external/*.tar.xz
+/build/external/vpp-*.deb
+/build/external/vpp-*.changes
 /path_setup
 /tools/
 # start autotools ignore