Update testsuite (#1275)

The two primary changes involved are:

1. Removal of `assert_return_canonical_nan`/`arithetic nan` in favor of
   special `nan:canonical`/`nan:arithmetic` constants that can only be
   used in test expectations.
   See: https://github.com/WebAssembly/spec/pull/1104

2. New trapping behaviour for bulk memory operations.  Range checks are
   now performed up front for opterations such as memory.fill and
   memory.copy.
   See: https://github.com/webassembly/bulk-memory-operations/issues/111
   And: https://github.com/webassembly/bulk-memory-operations/pull/123
   The old behaviour is still kept around to support table.fill which
   is defined in reference-types proposal and has yet to be updated.

1 files changed, 0 insertions, 0 deletions

diff --git a/third_party/testsuite b/third_party/testsuite
-Subproject 4e4ceb6ccbcd9ef39d464a9a6a61d94a7d57e7b
+Subproject dfd21598aa86fc0b03b92eeb881ebb45171d169