Windows: Bump busybox to v1.1

Signed-off-by: John Howard <jhoward@microsoft.com>

This is a follow-on from https://github.com/moby/moby/pull/38277
but had to be done in a couple of stages to ensure that CI didn't
break. v1.1 of the busybox image is now based on a CMD of "sh"
rather than using an entrypoint. And it also uses the bin directory
rather than `c:\busybox`. This makes it look a lot closer to the
Linux busybox image, and means that a couple of Windows-isms in
CI tests can be reverted back to be identical to their Linux
equivalents.

(cherry picked from commit 561e0f6b7fc256c160292b32695cf1d6150741db)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Upstream-commit: 613c2f27ed2e7d65474c2f3e786d9e24e757d99d
Component: engine

components/engine/integration-cli/docker_cli_build_test.go

@@ -3331,9 +3331,6 @@ func (s *DockerSuite) TestBuildVerifySingleQuoteFails(c *check.C) {
 	// it should barf on it.
 	name := "testbuildsinglequotefails"
 	expectedExitCode := 2
-	if testEnv.OSType == "windows" {
-		expectedExitCode = 127
-	}
 
 	buildImageSuccessfully(c, name, build.WithDockerfile(`FROM busybox
 		CMD [ '/bin/sh', '-c', 'echo hi' ]`))
@@ -6052,13 +6049,7 @@ FROM busybox
 WORKDIR /foo/bar
 `))
 	out, _ := dockerCmd(c, "inspect", "--format", "{{ json .Config.Cmd }}", image)
-
-	// The Windows busybox image has a blank `cmd`
-	lookingFor := `["sh"]`
-	if testEnv.OSType == "windows" {
-		lookingFor = "null"
-	}
-	c.Assert(strings.TrimSpace(out), checker.Equals, lookingFor)
+	c.Assert(strings.TrimSpace(out), checker.Equals, `["sh"]`)
 
 	image = "testworkdirlabelimagecmd"
 	buildImageSuccessfully(c, image, build.WithDockerfile(`
@@ -6068,7 +6059,7 @@ LABEL a=b
 `))
 
 	out, _ = dockerCmd(c, "inspect", "--format", "{{ json .Config.Cmd }}", image)
-	c.Assert(strings.TrimSpace(out), checker.Equals, lookingFor)
+	c.Assert(strings.TrimSpace(out), checker.Equals, `["sh"]`)
 }
 
 // Test case for 28902/28909