Add missing import

Julien LepillerMon Sep 28 00:28:08+0200 2020

e783037

Add missing import

gitile/handler.scm

2121
  #:use-module (gitile config)
2222
  #:use-module (gitile pages)
2323
  #:use-module (ice-9 match)
24+
  #:use-module (rnrs bytevectors)
2425
  #:use-module (sxml simple)
2526
  #:use-module (web request)
2627
  #:use-module (web response)