add restic component

component/restic/buildout.cfg

+[buildout]
+extends =
+  ../../component/golang/buildout.cfg
+
+parts =
+  restic
+
+[gowork]
+golang  = ${golang1.13:location}
+gcc-bin-directory = ${golang1.13:gcc-bin-directory}
+
+
+[restic]
+recipe  = plone.recipe.command
+update-command = ${:command}
+stop-on-error = True
+# GO111MODULE=on enables go modules support
+# the chmod is needed as modules are fetched with u-w
+command =
+  . ${gowork:env.sh} &&
+  cd ${git.github.com_restic_restic:location} &&
+  export GO111MODULE=on &&
+  go run build.go -o ${:output} &&
+  chmod -R u+w .
+output = ${gowork:bin}/restic
+location = ${:output}
+
+
+[git.github.com_restic_restic]
+<= go-git-package
+go.importpath = github.com/restic/restic
+repository =  https://github.com/restic/restic
+revision = v0.9.6
\ No newline at end of file