vendor: add qingstor-sdk-go for QingStor

vendor/github.com/pengsrc/go-shared/pid/pidfile_windows.go

@@ -0,0 +1,23 @@
+package pid
+
+import "syscall"
+
+const (
+	processQueryLimitedInformation = 0x1000
+
+	stillActive = 259
+)
+
+func processExists(pid int) bool {
+	h, err := syscall.OpenProcess(processQueryLimitedInformation, false, uint32(pid))
+	if err != nil {
+		return false
+	}
+	var c uint32
+	err = syscall.GetExitCodeProcess(h, &c)
+	syscall.Close(h)
+	if err != nil {
+		return c == stillActive
+	}
+	return true
+}