message: Update the googleapis patch slightly.
  bazel 1.0 uses its internal tool for patches. Differently from the external one, it cannot tolerate date information in the first line. Hence, we remove that.
  We also change it to not produce mocks, this seems to be a bit more robust.
diff: ---- google/cloud/kms/v1/BUILD.bazel 2019-10-11 02:11:13.000000000 +0200
  -+++ google/cloud/kms/v1/BUILD.bazel.2 2019-10-15 11:31:30.717369554 +0200
  -@@ -155,3 +155,25 @@
  +--- google/cloud/kms/v1/BUILD.bazel
  ++++ google/cloud/kms/v1/BUILD.bazel
  +@@ -155,3 +155,24 @@
  ":kms_go_proto",
  ],
  )
  +cc_grpc_library(
  + name = "kms_cc_grpc",
  + srcs = [":kms_proto"],
  -+ generate_mocks = True,
  + grpc_only = True,
  + deps = [":kms_cc_proto"],
  +)
  