Switch to github.com/golang/dep for vendoring

Signed-off-by: Mrunal Patel <mrunalp@gmail.com>

vendor/github.com/containers/storage/hack/make/gccgo

@@ -0,0 +1,26 @@
+#!/bin/bash
+set -e
+
+BINARY_NAME="oci-storage-$VERSION"
+BINARY_EXTENSION="$(binary_extension)"
+BINARY_FULLNAME="$BINARY_NAME$BINARY_EXTENSION"
+
+source "${MAKEDIR}/.go-autogen"
+
+# gccgo require explicit flag -pthread to allow goroutines to work.
+go build -compiler=gccgo \
+	-o "$DEST/$BINARY_FULLNAME" \
+	"${BUILDFLAGS[@]}" \
+	-gccgoflags "
+		-g
+		-Wl,--no-export-dynamic
+		-ldl
+		-pthread
+	" \
+	./cmd/oci-storage
+
+echo "Created binary: $DEST/$BINARY_FULLNAME"
+ln -sf "$BINARY_FULLNAME" "$DEST/oci-storage$BINARY_EXTENSION"
+
+hash_files "$DEST/$BINARY_FULLNAME"
+