Update rethrow depth handling and catch_all opcode (#1608)

Give `catch_all` its own opcode:

Previously `catch_all` shared an opcode with `else`, but
the spec now allocates it the 0x19 opcode.

Adjust rethrow depth semantics:

Previously this had interpreted the rethrow depth argument
as counting only catch blocks, but the spec has clarified that
it should count all blocks (in a similar fashion as `br` and
related instructions).

0 files changed, 0 insertions, 0 deletions