Fix build

Author: huoyaoyuan

src/coreclr/nativeaot/Runtime/unix/UnwindHelpers.cpp

@@ -4,6 +4,7 @@
 #include "common.h"
 #include "daccess.h"
 #include "rhassert.h"
+#include <minipal/utils.h>
 
 #define UNW_STEP_SUCCESS 1
 #define UNW_STEP_END     0

src/coreclr/utilcode/opinfo.cpp

@@ -112,7 +112,7 @@ const BYTE* OpInfo::fetch(const BYTE* instrPtr, OpArgsVal* args) {
 #ifdef _DEBUG
             _ASSERTE(!"BadType");
 #else
-            UNREACHABLE();        // we are really certain the default case does not happen
+            __UNREACHABLE();        // we are really certain the default case does not happen
 #endif
             break;
         }