message: guix: Bump time-machine for mingw-w64 patches
  This bump will includes a couple of commits which improve the
  reproducibility of the mingw-w64 toolchain. Most of which came from
  debian. They will be upstreamed as upstream Guix release timeline
  allows.
diff: @@ -17,7 +17,7 @@ SOURCE_DATE_EPOCH="${SOURCE_DATE_EPOCH:-$(git log --format=%at -1)}"
  # across time.
  time-machine() {
  guix time-machine --url=https://github.com/dongcarl/guix.git \
  - --commit=b3a7c72c8b2425f8ddb0fc6e3b1caeed40f86dee \
  + --commit=cf347affd642c709f7e423f7111794ffdb09f5a6 \
  -- "$@"
  }
  