bootstrap: copy latest from phosphor-hwmon

- Add a few Autoconf files created by newer autotools.
    - Make minor modifications to file list from phosphor-hwmon
      as requested by Vishwa.
- Clean files recursively since autotools can create files
  in subdirectories.
- Fix issues reported by shellcheck.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I74e294b44fc16e69d3d640752e4cdae3309578a1
1 file changed