Further Issues with TypeScript example

[Kaszanas]

While solving the #1349 with PRs: #1350 and #1352

Entirely new error was discovered, this time on:

 => ERROR [prereqs copy-and-build 21/21] RUN /usr/local/bin/buildifier   --mode=check --lint=warn --warnings=all -r ./WORKSPACE javascript net                                                                                             0.5s
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 > [prereqs copy-and-build 21/21] RUN /usr/local/bin/buildifier   --mode=check --lint=warn --warnings=all -r ./WORKSPACE javascript net:
0.504 ./WORKSPACE # reformat
0.504 javascript/net/grpc/web/generator/BUILD.bazel # reformat
0.504 net/grpc/gateway/examples/echo/BUILD.bazel # reformat
------
failed to solve: process "/bin/sh -c /usr/local/bin/buildifier   --mode=check --lint=warn --warnings=all -r ./WORKSPACE javascript net" did not complete successfully: exit code: 4

You may be interested in this @sampajano