Fix MODELICA_PLATFORM

Author: t-sommer

runtime/CMakeLists.txt

@@ -10,7 +10,7 @@ else ()
     set(MODELICA_PLATFORM linux)
 endif ()
 
-if (${CMAKE_HOST_SYSTEM_PROCESSOR} MATCHES "AMD64|x86_64|aarch64")
+if (${CMAKE_SYSTEM_PROCESSOR} MATCHES "AMD64|x86_64|aarch64")
     set(MODELICA_PLATFORM "${MODELICA_PLATFORM}64")
 else ()
     set(MODELICA_PLATFORM "${MODELICA_PLATFORM}32")