Fix validate_eof flag for EOF creation txs

[pdobacz]

Depends on ethereum/evmc#713, needs to set the submodule to a master revision of evmc before merging

Before, running evmc run with validate_eof would not recognize creation txs (which have to be validated as initcode) and regular calls to a deployed contract (which have to be validated as runtime) correctly. This fixes that.

Validation is only done on the top-level frame (msg->depth == 0), to avoid re-doing it on every deeper frame (all subcontainers are validated recursively anyway, so all code supplied will be validated).

Initcode/runtime code kind is decided by the msg->kind, which handling is in turn fixed in the evmc run in ethereum/evmc#713

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.29%. Comparing base (4542e8c) to head (02762fe).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #960   +/-   ##
=======================================
  Coverage   94.29%   94.29%           
=======================================
  Files         143      143           
  Lines       16129    16129           
=======================================
  Hits        15209    15209           
  Misses        920      920           

Flag	Coverage Δ
eof_execution_spec_tests	16.86% <50.00%> (ø)
ethereum_tests	26.92% <50.00%> (ø)
ethereum_tests_silkpre	18.69% <50.00%> (ø)
execution_spec_tests	17.95% <50.00%> (ø)
unittests	89.72% <100.00%> (ø)

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Files	Coverage Δ
lib/evmone/baseline_execution.cpp	100.00% <100.00%> (ø)