buildx: use v0.4.1

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
(cherry picked from commit 50aa8f2)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Upstream-commit: f43d3d3083af7d65c480ad63ffdac82b78c53e55
Component: packaging

Author: tonistiigi

components/packaging/plugins/buildx.installer

@@ -6,7 +6,7 @@ source "$(dirname "$0")/.common"
 PKG=github.com/docker/buildx
 GOPATH=$(go env GOPATH)
 REPO=https://${PKG}.git
-: "${BUILDX_COMMIT=master}"
+: "${BUILDX_COMMIT=v0.4.1}"
 DEST=${GOPATH}/src/${PKG}
 
 build() {