thunk_h: bump submodule for and use thunk_free()

thunk.h got some rudimentary environment caching, and in the
process introduced thunk_free().

Update the submodule and replace the bare free(closure) callsites
with thunk_free(closure).

This should help reduce the amount of malloc/free hammering in jio,
though there are still quite a few allocations for object payloads
in e.g. report-entry-arrays, and the object header space is allocated
as a thunk payload which doesn't get environment caching yet.

1 files changed, 0 insertions, 0 deletions

diff --git a/thunk_h b/thunk_h
-Subproject 070e8c57d5829e9b429f698c329a6d0b0d4d071
+Subproject 22ea32f0f945509888a3d0d5167b5d4ed001a3d