migrate to go-modules

Signed-off-by: Valentin Rothberg <rothberg@redhat.com>

vendor/github.com/vishvananda/netlink/.travis.yml

@@ -0,0 +1,13 @@
+language: go
+before_script:
+  # make sure we keep path in tact when we sudo
+  - sudo sed -i -e 's/^Defaults\tsecure_path.*$//' /etc/sudoers
+  # modprobe ip_gre or else the first gre device can't be deleted
+  - sudo modprobe ip_gre
+  # modprobe nf_conntrack for the conntrack testing
+  - sudo modprobe nf_conntrack
+  - sudo modprobe nf_conntrack_netlink
+  - sudo modprobe nf_conntrack_ipv4
+  - sudo modprobe nf_conntrack_ipv6
+install:
+  - go get github.com/vishvananda/netns

vendor/github.com/vishvananda/netlink/CHANGELOG.md

@@ -0,0 +1,5 @@
+# Changelog
+
+## 1.0.0 (2018-03-15)
+
+Initial release tagging

vendor/github.com/vishvananda/netlink/Makefile

@@ -0,0 +1,30 @@
+DIRS := \
+	. \
+	nl
+
+DEPS = \
+	github.com/vishvananda/netns \
+	golang.org/x/sys/unix
+
+uniq = $(if $1,$(firstword $1) $(call uniq,$(filter-out $(firstword $1),$1)))
+testdirs = $(call uniq,$(foreach d,$(1),$(dir $(wildcard $(d)/*_test.go))))
+goroot = $(addprefix ../../../,$(1))
+unroot = $(subst ../../../,,$(1))
+fmt = $(addprefix fmt-,$(1))
+
+all: test
+
+$(call goroot,$(DEPS)):
+	go get $(call unroot,$@)
+
+.PHONY: $(call testdirs,$(DIRS))
+$(call testdirs,$(DIRS)):
+	go test -test.exec sudo -test.parallel 4 -timeout 60s -test.v github.com/vishvananda/netlink/$@
+
+$(call fmt,$(call testdirs,$(DIRS))):
+	! gofmt -l $(subst fmt-,,$@)/*.go | grep -q .
+
+.PHONY: fmt
+fmt: $(call fmt,$(call testdirs,$(DIRS)))
+
+test: fmt $(call goroot,$(DEPS)) $(call testdirs,$(DIRS))