Update the spec reference testsuite submodule (#3450)

* Update the spec reference testsuite submodule

This commit brings in recent updates to the spec test suite. Most of the
changes here were already fixed in `wasmparser` with some tweaks to
esoteric modules, but Wasmtime also gets a bug fix where where import
matching for the size of tables/memories is based on the current runtime
size of the table/memory rather than the original type of the
table/memory. This means that during type matching the actual value is
consulted for its size rather than using the minimum size listed in its
type.

* Fix now-missing directories in build script

tests/misc_testsuite/no-panic.wast

@@ -0,0 +1,26 @@
+(module
+  (func $test (param i32) (result externref)
+        i32.const 0
+        if
+        else
+        end
+        local.get 0
+        table.get 0
+  )
+  (table 4 externref)
+  (export "test" (func $test))
+)
+
+(module
+  (func $test (param i32)
+        i32.const 0
+        if
+        else
+        end
+        local.get 0
+        ref.null extern
+        table.set 0
+  )
+  (table 4 externref)
+  (export "test" (func $test))
+)