message: Set macro instead of surpressing the warning for third_party/zlib.BUILD.
diff: @@ -49,7 +49,7 @@ cc_library(
  ":windows_msvc": [],
  "//conditions:default": [
  "-Wno-shift-negative-value",
  - "-Wno-implicit-function-declaration",
  + "-DZ_HAVE_UNISTD_H",
  ],
  }),
  includes = ["."],
  