Convert to Go modules (#1178)

* Convert to Go modules

* Update promu config.
* Convert to Go modules.
* Update vendoring.
* Update Makefile.common.
* Update circleci config.
* Use Prometheus release tar for promtool.
* Fixup unpack

* Use temp dir for unpacking tools.
* Use BSD compatible tar command.
* OpenBSD mkdir doesn't support `-v`.

Signed-off-by: Ben Kochie <superq@gmail.com>

vendor/github.com/godbus/dbus/.travis.yml

@@ -0,0 +1,40 @@
+dist: precise
+language: go
+go_import_path: github.com/godbus/dbus
+sudo: true
+
+go:
+  - 1.6.3
+  - 1.7.3
+  - tip
+
+env:
+  global:
+  matrix:
+   - TARGET=amd64
+   - TARGET=arm64
+   - TARGET=arm
+   - TARGET=386
+   - TARGET=ppc64le
+
+matrix:
+  fast_finish: true
+  allow_failures:
+    - go: tip
+  exclude:
+  - go: tip
+    env: TARGET=arm
+  - go: tip
+    env: TARGET=arm64
+  - go: tip
+    env: TARGET=386
+  - go: tip
+    env: TARGET=ppc64le
+
+addons:
+  apt:
+    packages:
+    - dbus
+    - dbus-x11
+
+before_install: