Currently, the GWT UI zip files contain some empty bazel directories:
$ unzip -l bazel-genfiles/gerrit-gwtui/ui_optdbg.zip | grep bazel
Archive: bazel-genfiles/gerrit-gwtui/ui_optdbg.zip
0 2016-12-20 09:57 bazel-out/
0 2016-12-20 09:57 bazel-out/local-fastbuild/
0 2016-12-20 09:57 bazel-out/local-fastbuild/genfiles/
0 2016-12-20 09:57 bazel-out/local-fastbuild/genfiles/gerrit-gwtui/
These end up making it into the WAR files, which is unfortunate. The
easiest way to eliminate these is to just omit all directories from
this one intermediate zip file. As there are several other
intermediate zip files, we actually still end up with directory
entries in the output WAR, just not these garbage ones.
Change-Id: I32bb39acc4d32207f9e006486cbba47fc06e0be0
68ea4b0075