update dependencies

vendor/golang.org/x/sys/windows/syscall_test.go

@@ -7,6 +7,7 @@
 package windows_test
 
 import (
+	"syscall"
 	"testing"
 
 	"golang.org/x/sys/windows"
@@ -31,3 +32,22 @@ func TestEnv(t *testing.T) {
 	// make sure TESTENV gets set to "", not deleted
 	testSetGetenv(t, "TESTENV", "")
 }
+
+func TestGetProcAddressByOrdinal(t *testing.T) {
+	// Attempt calling shlwapi.dll:IsOS, resolving it by ordinal, as
+	// suggested in
+	// https://msdn.microsoft.com/en-us/library/windows/desktop/bb773795.aspx
+	h, err := windows.LoadLibrary("shlwapi.dll")
+	if err != nil {
+		t.Fatalf("Failed to load shlwapi.dll: %s", err)
+	}
+	procIsOS, err := windows.GetProcAddressByOrdinal(h, 437)
+	if err != nil {
+		t.Fatalf("Could not find shlwapi.dll:IsOS by ordinal: %s", err)
+	}
+	const OS_NT = 1
+	r, _, _ := syscall.Syscall(procIsOS, 1, OS_NT, 0, 0)
+	if r == 0 {
+		t.Error("shlwapi.dll:IsOS(OS_NT) returned 0, expected non-zero value")
+	}
+}

vendor/golang.org/x/sys/windows/syscall_windows.go

@@ -202,6 +202,21 @@ func NewCallbackCDecl(fn interface{}) uintptr {
 
 // syscall interface implementation for other packages
 
+// GetProcAddressByOrdinal retrieves the address of the exported
+// function from module by ordinal.
+func GetProcAddressByOrdinal(module Handle, ordinal uintptr) (proc uintptr, err error) {
+	r0, _, e1 := syscall.Syscall(procGetProcAddress.Addr(), 2, uintptr(module), ordinal, 0)
+	proc = uintptr(r0)
+	if proc == 0 {
+		if e1 != 0 {
+			err = errnoErr(e1)
+		} else {
+			err = syscall.EINVAL
+		}
+	}
+	return
+}
+
 func Exit(code int) { ExitProcess(uint32(code)) }
 
 func makeInheritSa() *SecurityAttributes {