Add a vpp-dpdk-dev package, enable plugins to use dpdk APIs directly

Change-Id: I69db06a0b5d5d556c2fd570ea0056bb59d7bc3d6
Signed-off-by: Dave Barach <dave@barachs.net>
diff --git a/.gitignore b/.gitignore
index 05d08a6..f0b17c0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,6 +3,7 @@
 /build-root/build-*/
 /build-root/install-*/
 /build-root/tools
+/build-root/dpdk-includes/
 /build-root/packages-vpp/
 /build-root/path_setup
 /build-root/build-config.mk