Fix arm64 detection precedence in CMakeLists.txt (#209)

Fixes #179

Author: gchatelet

CMakeLists.txt

@@ -52,10 +52,10 @@ set(PROCESSOR_IS_POWER FALSE)
 
 if(CMAKE_SYSTEM_PROCESSOR MATCHES "^mips")
   set(PROCESSOR_IS_MIPS TRUE)
+elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "^(aarch64|arm64)")
+  set(PROCESSOR_IS_AARCH64 TRUE)
 elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "^arm")
   set(PROCESSOR_IS_ARM TRUE)
-elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "^aarch64")
-  set(PROCESSOR_IS_AARCH64 TRUE)
 elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "(x86_64)|(AMD64|amd64)|(^i.86$)")
   set(PROCESSOR_IS_X86 TRUE)
 elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "^(powerpc|ppc)")