8292352: 32-bit Windows build failures after JDK-8290059

Reviewed-by: stuefe

Author: shipilev

test/lib/native/testlib_threads.h

@@ -54,7 +54,7 @@ static void fatal(const char* message, int code) {
 // Adapt from the callback type the OS API expects to
 // our OS-independent PROCEDURE type.
 #ifdef _WIN32
-static DWORD procedure(_In_ LPVOID ctxt) {
+DWORD WINAPI procedure(_In_ LPVOID ctxt) {
 #else
 void* procedure(void* ctxt) {
 #endif