windows: add TimeBeginPeriod and TimeEndPeriod syscalls

Updates golang/go#44343
Fixes golang/go#61723

Change-Id: I920f2fad6b3a2a9ba67ff2fafea4319644a0bc8c
Reviewed-on: https://go-review.googlesource.com/c/sys/+/515915
Reviewed-by: qiulaidongfeng <2645477756@qq.com>
Run-TryBot: Quim Muntal <quimmuntal@gmail.com>
Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>

windows/syscall_windows.go

@@ -437,6 +437,10 @@ func NewCallbackCDecl(fn interface{}) uintptr {
 //sys	DwmGetWindowAttribute(hwnd HWND, attribute uint32, value unsafe.Pointer, size uint32) (ret error) = dwmapi.DwmGetWindowAttribute
 //sys	DwmSetWindowAttribute(hwnd HWND, attribute uint32, value unsafe.Pointer, size uint32) (ret error) = dwmapi.DwmSetWindowAttribute
 
+// Windows Multimedia API
+//sys TimeBeginPeriod (period uint32) (err error) [failretval != 0] = winmm.timeBeginPeriod
+//sys TimeEndPeriod (period uint32) (err error) [failretval != 0] = winmm.timeEndPeriod
+
 // syscall interface implementation for other packages
 
 // GetCurrentProcess returns the handle for the current process.

windows/syscall_windows_test.go

@@ -1164,3 +1164,12 @@ items_loop:
 		}
 	}
 }
+
+func TestTimePeriod(t *testing.T) {
+	if err := windows.TimeBeginPeriod(1); err != nil {
+		t.Fatal(err)
+	}
+	if err := windows.TimeEndPeriod(1); err != nil {
+		t.Fatal(err)
+	}
+}