Uses "zip -@" to avoid arguments with too many files. Fixes #1303.

--
MOS_MIGRATED_REVID=122990255
diff --git a/src/test/shell/bazel/BUILD b/src/test/shell/bazel/BUILD
index 7f3937e..2b3578a 100644
--- a/src/test/shell/bazel/BUILD
+++ b/src/test/shell/bazel/BUILD
@@ -150,7 +150,7 @@
         "//third_party:srcs",
     ],
     outs = ["doc-srcs.zip"],
-    cmd = "zip -q $@ $(SRCS)",
+    cmd = "echo $(SRCS) | tr ' ' '\n' | zip -q@ $@",
 )
 
 sh_test(