add vendoring with go dep

vendor/github.com/influxdata/influxdb/tsdb/engine/tsm1/pools.go

@@ -0,0 +1,26 @@
+package tsm1
+
+import "sync"
+
+var bufPool sync.Pool
+
+// getBuf returns a buffer with length size from the buffer pool.
+func getBuf(size int) *[]byte {
+	x := bufPool.Get()
+	if x == nil {
+		b := make([]byte, size)
+		return &b
+	}
+	buf := x.(*[]byte)
+	if cap(*buf) < size {
+		b := make([]byte, size)
+		return &b
+	}
+	*buf = (*buf)[:size]
+	return buf
+}
+
+// putBuf returns a buffer to the pool.
+func putBuf(buf *[]byte) {
+	bufPool.Put(buf)
+}