CMake: rename target doc -> ZycoreDoc

Both the documentation target in zycore and zydis were previously called
"doc" which caused a CMake error in zydis complaining about the same name
being used twice.

Author: athre0z

CMakeLists.txt

@@ -218,9 +218,10 @@ install(DIRECTORY "include/" DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
 # =============================================================================================== #
 # Doxygen documentation                                                                           #
 # =============================================================================================== #
+
 find_package(Doxygen)
 if (DOXYGEN_FOUND)
-    doxygen_add_docs(doc "include/Zycore/" ALL)
+    doxygen_add_docs(ZycoreDoc "include/Zycore/" ALL)
     install(
         DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/html/"
         DESTINATION "${CMAKE_INSTALL_DOCDIR}/api"