8268463: Windows 32bit build fails in DynamicCodeGenerated\libDynamicCodeGenerated.cpp

Reviewed-by: sspitsyn, cjplummer

Author: MBaesken

test/hotspot/jtreg/serviceability/jvmti/DynamicCodeGenerated/libDynamicCodeGenerated.cpp

@@ -46,7 +46,8 @@ void JNICALL DynamicCodeGenerated(jvmtiEnv* jvmti, const char* name, const void*
 
 }
 
-jint Agent_OnLoad(JavaVM* vm, char* options, void* reserved) {
+JNIEXPORT jint JNICALL
+Agent_OnLoad(JavaVM* vm, char* options, void* reserved) {
  vm->GetEnv((void**)&jvmti, JVMTI_VERSION_1_0);
  jvmtiEventCallbacks callbacks;
  memset(&callbacks, 0, sizeof(callbacks));