CMakeDetermineCompilerId: Fix local var init

Add initialization of the ARCHITECTURE_ID local and fix the
initialization of the COMPILER_ID_TWICE local.

Modules/CMakeDetermineCompilerId.cmake

@@ -308,9 +308,10 @@ function(CMAKE_DETERMINE_COMPILER_ID_CHECK lang file)
     set(COMPILER_ID)
     set(COMPILER_VERSION)
     set(PLATFORM_ID)
+    set(ARCHITECTURE_ID)
     file(STRINGS ${file}
       CMAKE_${lang}_COMPILER_ID_STRINGS LIMIT_COUNT 4 REGEX "INFO:")
-    set(HAVE_COMPILER_TWICE 0)
+    set(COMPILER_ID_TWICE)
     foreach(info ${CMAKE_${lang}_COMPILER_ID_STRINGS})
       if("${info}" MATCHES ".*INFO:compiler\\[([^]\"]*)\\].*")
         if(COMPILER_ID)