Unfork buildkit to use latest HEAD

go.mod

@@ -3,10 +3,7 @@ module github.com/openllb/hlb
 go 1.12
 
 require (
-	github.com/Shopify/logrus-bugsnag v0.0.0-20171204204709-577dee27f20d // indirect
 	github.com/alecthomas/participle v0.4.2-0.20191230055107-1fbf95471489
-	github.com/bitly/go-simplejson v0.5.0 // indirect
-	github.com/bmizerany/assert v0.0.0-20160611221934-b7ed37b82869 // indirect
 	github.com/creachadair/jrpc2 v0.8.1
 	github.com/docker/buildx v0.3.2-0.20200410204309-f4ac640252b8
 	github.com/docker/cli v1.14.0-0.20190523191156-ab688a9a79a1
@@ -15,9 +12,8 @@ require (
 	github.com/lithammer/dedent v1.1.0
 	github.com/logrusorgru/aurora v0.0.0-20191116043053-66b7ad493a23
 	github.com/mattn/go-isatty v0.0.11
-	github.com/matttproud/golang_protobuf_extensions v1.0.1 // indirect
 	github.com/mitchellh/go-homedir v1.1.0
-	github.com/moby/buildkit v0.7.1-0.20200409032528-226a5db9ad3d
+	github.com/moby/buildkit v0.7.1-0.20200525141520-d6f5e972def2
 	github.com/opencontainers/go-digest v1.0.0
 	github.com/opencontainers/image-spec v1.0.1
 	github.com/openllb/doxygen-parser v0.0.0-20200128221307-2aa2d8be1c35
@@ -34,8 +30,6 @@ require (
 
 replace github.com/alecthomas/participle => github.com/hinshun/participle v0.4.2-0.20200115220927-0afe0602c1fc
 
-replace github.com/moby/buildkit => github.com/tonistiigi/buildkit v0.0.0-20200521014820-7c81e16b8af4
-
 replace github.com/hashicorp/go-immutable-radix => github.com/tonistiigi/go-immutable-radix v0.0.0-20170803185627-826af9ccf0fe
 
 replace github.com/jaguilar/vt100 => github.com/tonistiigi/vt100 v0.0.0-20190402012908-ad4c4a574305