Add buildx history command

These commands allow working with build records
of completed and running builds.

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>

vendor/github.com/pkg/browser/browser_windows.go

@@ -0,0 +1,7 @@
+package browser
+
+import "golang.org/x/sys/windows"
+
+func openBrowser(url string) error {
+	return windows.ShellExecute(0, nil, windows.StringToUTF16Ptr(url), nil, nil, windows.SW_SHOWNORMAL)
+}