Add more architecture names

CMake Error at CMakeLists.txt:164 (message):
  Unsupported target processor: amd64

--- CMakeLists.txt.orig	2021-09-17 14:06:15 UTC
+++ CMakeLists.txt
@@ -154,6 +154,8 @@ if(${CMAKE_SYSTEM_PROCESSOR} STREQUAL "x86_64")
   set(NEO_TARGET_PROCESSOR "x86_64")
 elseif(${CMAKE_SYSTEM_PROCESSOR} STREQUAL "AMD64")
   set(NEO_TARGET_PROCESSOR "x86_64")
+elseif(${CMAKE_SYSTEM_PROCESSOR} STREQUAL "amd64")
+  set(NEO_TARGET_PROCESSOR "x86_64")
 elseif(${CMAKE_SYSTEM_PROCESSOR} STREQUAL "aarch64")
   set(NEO_TARGET_PROCESSOR "aarch64")
   include_directories(${CMAKE_CURRENT_SOURCE_DIR}/third_party/sse2neon)