Update spec tests; rename {grow,current}_memory (#849)

`grow_memory` -> `memory.grow`
`current_memory` -> `memory.size`

This could have been a smaller change, but I took the opportunity to
rename the Token types, Expr types, and callback functions too. Many of
these are sorted alphabetically, so I resorted based on their new names.

1 files changed, 0 insertions, 0 deletions

diff --git a/third_party/testsuite b/third_party/testsuite
-Subproject 8958a44bf8b3dbf9e48dd1c44ee566e8bf682ab
+Subproject c6a690f89a0dda3c79700aa6377d8b5d8a970eb