Adding armv8 crypto extensions to AES

[tedeaton]

Adds armv8 crypto extension to AES, similar to #1052.

• Adds additional files to CMakeLists.txt
• Changes tests/system_info.c to describe if arm extensions are used for AES
• Generalizes the C_OR_NI macro in src/common/aes/aes.c and tests/system_info.c to C_OR_NI_OR_ARM
• input / output behaviour is not changes
• algorithms available does not change

[baentsch]

FWIW: If you want to get AppVeyor to pass (by using an old gcc), you may want to (temporarily, until #1035 is fixed) replace

c:\cygwin64\bin\bash.exe -lc "setup-x86_64.exe -qnNdO -R C:/cygwin64 -l C:/cygwin/var/cache/setup -P openssl -P libssl-devel -P ninja -P cmake -P gcc ...

with

c:\cygwin64\bin\bash.exe -lc "setup-x86_64.exe -qnNdO -R C:/cygwin64 -l C:/cygwin/var/cache/setup -P openssl -P libssl-devel -P ninja -P cmake -P gcc-core=9.3.0-2 ...

in appveyor_build.bat.