vlib: startup multi-arch variant configuration

Support for startup node multi-arch variant selection through startup.conf.
This is to facilitate unit, functional testing and benchmarking of non-default
multi-arch variant node code path. Also added parameters to make test, to
specific using multi-arch variants in unit testing.

Type: improvement

Signed-off-by: Ray Kinsella <mdr@ashroe.eu>
Change-Id: I94fd332bb629683b7a7dd770ee9f615a9a424060
diff --git a/extras/vpp_config/data/startup.conf.template b/extras/vpp_config/data/startup.conf.template
index 906b092..1945af5 100644
--- a/extras/vpp_config/data/startup.conf.template
+++ b/extras/vpp_config/data/startup.conf.template
@@ -120,4 +120,14 @@
 # Alternate syntax to choose plugin path
 #plugin_path /home/bms/vpp/build-root/install-vpp-native/vpp/lib/vpp_plugins
 
+#node-variants {{
+#	defaults {{
+#		avx512 100
+#	}}
+#	ip4-inacl {{
+#	avx2 100
+#		avx512 50
+#	}}
+#}}
+
 {tcp}