Make the hmaptool support response file

[qyang-nj]

Currently if we have a long list of header files for header_map rule

header_map(
  name = "HeaderMap",
  hdrs = [<A long list of header files],
)

we will see the following build error:

tools_hmaptool_BinaryHeaderMapTool/BinaryHeaderMapTool.swift:45: Fatal error: Missing output path

This is because Bazel will use response file for a long list of parameters (here). This PR makes hmaptool to support the response file and avoid the build error.

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