Use proper import path go.etcd.io/bbolt

Signed-off-by: Robert-André Mauchin <zebob.m@gmail.com>

vendor/go.etcd.io/bbolt/bolt_linux.go

@@ -0,0 +1,10 @@
+package bbolt
+
+import (
+	"syscall"
+)
+
+// fdatasync flushes written data to a file descriptor.
+func fdatasync(db *DB) error {
+	return syscall.Fdatasync(int(db.file.Fd()))
+}