Improve CMake file

[flobernd]

Change dependency path from "per project" to "per dependency"

ZYDIS_ZYCORE_PATH -> ZYAN_ZYCORE_PATH
...

This way we do not need to change multiple path variables when a dependency is used multiple times. E.g. in case of Zyrex:

• Zyrex
  • Zycore (./dependencies/zycore [ZYREX_ZYCORE_PATH])
  • Zydis (./dependencies/zydis [ZYREX_ZYDIS_PATH])
    • Zycore (./dependencies/zydis/dependencies/zycore [ZYDIS_ZYCORE_PATH])

After my change there is only one Zycore path pointing to the top-level dependency:

• Zyrex
  • Zycore (./dependencies/zycore [ZYAN_ZYCORE_PATH])
  • Zydis (./dependencies/zydis [ZYAN_ZYDIS_PATH])
    • Zycore (./dependencies/zycore [ZYAN_ZYCORE_PATH])

Only negative point: This prevents the user to intentionally choose different dependency versions for individual sub-dependencies. I don' think this is really needed tho and as well to fully support that (at least for Windows shared builds) we would have to add a version suffix to the generated .dll files.

[athre0z]

The ZYDIS -> ZYAN rename for re-usability looks good to me. Will break the Debian build though (CC @Tachi107).

[Tachi107]

The ZYDIS -> ZYAN rename for re-usability looks good to me. Will break the Debian build though (CC @Tachi107).

@athre0z don't worry, before updating I always check if I have to change the Debian build script, but thanks for keeping me updated :)