Io: Update async priority more correctly.

When an operation finishes, whether it uses the priority from the first
operation or the current thread's priority depends on sdk version, it
seems.

This also makes it resolve the default priority on open, so that changing
the default afterward doesn't affect already open descriptors.

Core/HLE/HLEHelperThread.cpp

@@ -16,9 +16,11 @@
 // https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
 
 #include "Common/ChunkFile.h"
+#include "Core/CoreTiming.h"
 #include "Core/MemMapHelpers.h"
 #include "Core/HLE/HLE.h"
 #include "Core/HLE/HLEHelperThread.h"
+#include "Core/HLE/KernelWaitHelpers.h"
 #include "Core/HLE/sceKernelThread.h"
 #include "Core/HLE/sceKernelMemory.h"
 #include "Core/MIPS/MIPSCodeUtils.h"
@@ -91,6 +93,13 @@ void HLEHelperThread::ChangePriority(u32 prio) {
 	KernelChangeThreadPriority(id_, prio);
 }
 
+void HLEHelperThread::Resume(WaitType waitType, SceUID uid, int result) {
+	bool res = HLEKernel::ResumeFromWait(id_, waitType, uid, result);
+	if (!res) {
+		ERROR_LOG(HLE, "Failed to wake helper thread from wait");
+	}
+}
+
 void HLEHelperThread::Forget() {
 	id_ = 0;
 	entry_ = 0;