Fixed `xchg` aliasing (Fixes #560) #1047

Job	Run time
MSBuild build (windows-2022)	1m 15s
Amalgamated build (Ubuntu 22.04)	6s
CMake build + tests (macos-latest )	15s
CMake build + tests (windows-2022 )	1m 10s
CMake build + tests (ubuntu-22.04 -DZYAN_NO_LIBC=ON)	9s
fuzzing (address)	12m 10s
CMake build + tests (ubuntu-22.04 )	11s
CMake build + tests (ubuntu-22.04 -DZYDIS_MINIMAL_MODE=ON -DZYDIS_FEATURE_ENCODER=OFF)	8s
CMake build + tests (windows-2022 -DZYAN_NO_LIBC=ON)	56s
CMake build + tests (windows-2022 -TClangCL)	1m 27s
Meson build + tests (windows-2022, debug default)	1m 17s
fuzzing (undefined)	12m 6s
Meson build + tests (ubuntu-22.04, debug default)	14s
Meson build + tests (ubuntu-22.04, debug NO_LIBC)	16s
Meson build + tests (windows-2022, debug NO_LIBC)	1m 9s
Meson build + tests (macos-latest, debug default)	19s
CMake build + tests (macos-latest -DZYAN_NO_LIBC=ON)	13s
Meson build + tests (ubuntu-22.04, release NO_LIBC)	31s
Meson build + tests (windows-2022, release default)	1m 17s
fuzzing (memory)	12m 12s
Meson build + tests (macos-latest, release default)	20s
Meson build + tests (windows-2022, release NO_LIBC)	45s
Meson build + tests (ubuntu-22.04, release default)	14s
Meson build + tests (ubuntu-22.04, minsize )	19s
	48m 59s

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