changelog: Add entry about added 32-bit architecture support
E.g. `./modules/vm.so,engine=compiler,trace,verbosity=2`.
A VM can be loaded, created and configured atomically with
new `evmc_load_and_configure()` function.
+- Added: [[#327](https://github.com/ethereum/evmc/pull/327)]
+ Full support for 32-bit architectures has been added.
- Changed: [[#293](https://github.com/ethereum/evmc/pull/293)]
In C++ API `evmc::result::raw()` renamed to `evmc::result::release_raw()`.
- Changed: [[#311](https://github.com/ethereum/evmc/pull/311)]
