Bump time submodule

My previous attempt at bumping `time` was confused by a non-fast-forward
update from upstream. Here we merge the orphaned commit back into
master, fixing mirroring.

Also, we will now follow upstream's `ghc` branch instead of `master` to
prevent this sort of thing happening again in the future.

1 files changed, 0 insertions, 0 deletions

diff --git a/libraries/time b/libraries/time
-Subproject 6e202edc1b0e32c25bc13194e6496c2c1819846
+Subproject 4eb06c0e5381a5b5ad2186ac6ecff434cd71137