update go-containerregistry so that kaniko works nicely with Harbor or Gitlab. (#227)

Gopkg.lock

@@ -441,7 +441,7 @@
     "pkg/v1/types",
     "pkg/v1/v1util"
   ]
-  revision = "3f6471078a9661a9a439bd5e71a371aff429566a"
+  revision = "d54baf9aa28edb9b985a6b35b57e26e3410c2443"
 
 [[projects]]
   name = "github.com/googleapis/gax-go"

vendor/github.com/google/go-containerregistry/pkg/v1/remote/write.go

@@ -145,7 +145,9 @@ func (w *writer) initiateUpload(h v1.Hash) (location string, mounted bool, err e
 	// if "mount" is specified, even if no "from" sources are specified.  If this turns out
 	// to not be broadly applicable then we should replace mounts without "from"s with a HEAD.
 	if ml, ok := l.(*MountableLayer); ok {
-		uv["from"] = []string{ml.Reference.Context().RepositoryStr()}
+		if w.ref.Context().RegistryStr() == ml.Reference.Context().RegistryStr() {
+			uv["from"] = []string{ml.Reference.Context().RepositoryStr()}
+		}
 	}
 	u.RawQuery = uv.Encode()