ensure the pragma is only applied to MSVC

Author: John

include/rapidjson/internal/biginteger.h

@@ -17,7 +17,7 @@
 
 #include "../rapidjson.h"
 
-#if defined(_MSC_VER) && defined(_M_AMD64)
+#if defined(_MSC_VER) && !__INTEL_COMPILER && defined(_M_AMD64)
 #include <intrin.h> // for _umul128
 #pragma intrinsic(_umul128)
 #endif