Add the waits that support I/O completion routines in kernel32.odin

core/sys/windows/kernel32.odin

@@ -156,6 +156,7 @@ foreign kernel32 {
 		TolerableDelay: ULONG,
 	) -> BOOL ---
 	WaitForSingleObject :: proc(hHandle: HANDLE, dwMilliseconds: DWORD) -> DWORD ---
+	WaitForSingleObjectEx :: proc(hHandle: HANDLE, dwMilliseconds: DWORD, bAlertable: BOOL) -> DWORD ---
 	Sleep :: proc(dwMilliseconds: DWORD) ---
 	GetProcessId :: proc(handle: HANDLE) -> DWORD ---
 	CopyFileExW :: proc(
@@ -299,6 +300,13 @@ foreign kernel32 {
 		bWaitAll: BOOL,
 		dwMilliseconds: DWORD,
 	) -> DWORD ---
+	WaitForMultipleObjectsEx :: proc(
+		nCount: DWORD,
+		lpHandles: ^HANDLE,
+		bWaitAll: BOOL,
+		dwMilliseconds: DWORD,
+		bAlertable: BOOL,
+	) -> DWORD ---
 	CreateNamedPipeW :: proc(
 		lpName: LPCWSTR,
 		dwOpenMode: DWORD,