Merge pull request #219 from caseydavenport/support-libcalico-branch-3.3

Pin to correct release-v3.3 branch

Author: caseydavenport

Makefile

@@ -198,7 +198,7 @@ vendor vendor/.up-to-date: glide.lock
 
 # Default the libcalico repo and version but allow them to be overridden
 LIBCALICO_REPO?=github.com/projectcalico/libcalico-go
-LIBCALICO_VERSION?=$(shell git ls-remote git@github.com:projectcalico/libcalico-go master 2>/dev/null | cut -f 1)
+LIBCALICO_VERSION?=$(shell git ls-remote git@github.com:projectcalico/libcalico-go release-v3.3 2>/dev/null | cut -f 1)
 
 ## Update libcalico pin in glide.yaml
 update-libcalico: