all: update to github.com/golang/protobuf@b9f5089f

Change-Id: I6178e0552630f2eb11f0ad95d77f23527708e5ec
Reviewed-on: https://go-review.googlesource.com/c/protobuf/+/186638
Reviewed-by: Damien Neil <dneil@google.com>
diff --git a/cmd/protoc-gen-go-grpc/testdata/go.mod b/cmd/protoc-gen-go-grpc/testdata/go.mod
index 5058fad..67f6a1c 100644
--- a/cmd/protoc-gen-go-grpc/testdata/go.mod
+++ b/cmd/protoc-gen-go-grpc/testdata/go.mod
@@ -1,7 +1,7 @@
 module google.golang.org/protobuf/cmd/protoc-gen-go-grpc/testdata
 
 require (
-	github.com/golang/protobuf v1.2.1-0.20190620192300-1ee46dfd80dd
+	github.com/golang/protobuf v1.2.1-0.20190717234224-b9f5089fb9d4
 	google.golang.org/grpc v1.19.0
 	google.golang.org/protobuf v1.0.0
 )
diff --git a/cmd/protoc-gen-go/testdata/go.mod b/cmd/protoc-gen-go/testdata/go.mod
index 88223be..fbf038f 100644
--- a/cmd/protoc-gen-go/testdata/go.mod
+++ b/cmd/protoc-gen-go/testdata/go.mod
@@ -1,7 +1,7 @@
 module google.golang.org/protobuf/cmd/protoc-gen-go/testdata
 
 require (
-	github.com/golang/protobuf v1.2.1-0.20190620192300-1ee46dfd80dd
+	github.com/golang/protobuf v1.2.1-0.20190717234224-b9f5089fb9d4
 	google.golang.org/protobuf v1.0.0
 )
 
diff --git a/go.mod b/go.mod
index a8b14f8..d9c1034 100644
--- a/go.mod
+++ b/go.mod
@@ -3,6 +3,6 @@
 go 1.9
 
 require (
-	github.com/golang/protobuf v1.2.1-0.20190620192300-1ee46dfd80dd
+	github.com/golang/protobuf v1.2.1-0.20190717234224-b9f5089fb9d4
 	github.com/google/go-cmp v0.3.0
 )
diff --git a/go.sum b/go.sum
index c520f21..274f450 100644
--- a/go.sum
+++ b/go.sum
@@ -5,8 +5,9 @@
 github.com/golang/protobuf v1.2.1-0.20190523175523-a1331f0b4ab4/go.mod h1:G+fNMoyvKWZDB7PCDHF+dXbH9OeE3+JoozCd9V7i66U=
 github.com/golang/protobuf v1.2.1-0.20190605195750-76c9e09470ba/go.mod h1:S1YIJXvYHGRCG2UmZsOcElkAYfvZLg2sDRr9+Xu8JXU=
 github.com/golang/protobuf v1.2.1-0.20190617175902-f94016f5239f/go.mod h1:G+HpKX7pYZAVkElkAWZkr08MToW6pTp/vs+E9osFfbg=
-github.com/golang/protobuf v1.2.1-0.20190620192300-1ee46dfd80dd h1:L1x/aDMeYxfjCU4baQkloBot8RGm5NEHP1wfoINRd+g=
 github.com/golang/protobuf v1.2.1-0.20190620192300-1ee46dfd80dd/go.mod h1:+CMAsi9jpYf/wAltLUKlg++CWXqxCJyD8iLDbQONsJs=
+github.com/golang/protobuf v1.2.1-0.20190717234224-b9f5089fb9d4 h1:Hj8cGYPgLw3MR0AGL0GFObh4pq8i31QOWWMCE0KY9z4=
+github.com/golang/protobuf v1.2.1-0.20190717234224-b9f5089fb9d4/go.mod h1:tDQPRlaHYu9yt1wPgdx85inRiLvUCuJZXsYjC0mwc1c=
 github.com/google/go-cmp v0.3.0 h1:crn/baboCvb5fXaQ0IJ1SGTsTVrWpDsCWC8EGETZijY=
 github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
 google.golang.org/protobuf v0.0.0-20190514172829-e89e6244e0e8/go.mod h1:791zQGC15vDqjpmPRn1uGPu5oHy/Jzw/Q1n5JsgIIcY=
@@ -17,3 +18,4 @@
 google.golang.org/protobuf v0.0.0-20190605195314-89d49632e5cf/go.mod h1:Btug4TBaP5wNYcb2zGKDTS7WMcaPPLuqEAKfEAZWYbo=
 google.golang.org/protobuf v0.0.0-20190617175724-bd7b7a9e0c26/go.mod h1:+FOB8T5/Yw4ywwdyeun9/KlDeuwFYBkNQ+kVuwj9C94=
 google.golang.org/protobuf v0.0.0-20190620020611-d888139e7b59/go.mod h1:of3pt14Y+dOxz2tBOHXEoapPpKFC15/0zWhPAddkfsU=
+google.golang.org/protobuf v0.0.0-20190717230113-f647c82cc3c7/go.mod h1:yGm7aNHn9Bp1NIvj6+CVUkcJshu+Usshfd3A+YxEuI8=