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- Log format changed to pass values instead of hashes.
- Log.path will now be passed untouched, preserving original case from
  section path.  This allows for potentially case-sensitive operations
  later.
- Testing added to ensure the expected case behaviour,
  ThirdPartyTest.PathCaseSensistive.
- Also, reordered arguments for GetFingerprintString, to be more
  intuitively tied to the format string.

R: pmonette@chromium.org
Test: chrome_elf_unittests.exe, ThirdParty*
Bug: 769590
Change-Id: Ib28ec13da7bf27168513031f583bd47e47da0dcc
Reviewed-on: https://chromium-review.googlesource.com/1136660Reviewed-by: Patrick Monette <pmonette@chromium.org>
Commit-Queue: Penny MacNeil <pennymac@chromium.org>
Cr-Commit-Position: refs/heads/master@{#575033}