RFR: 398: git webrev cannot handle a file named index.html

[Robin Westberg]

Hi all,

Please review this change that allows git webrev to generate webrevs even if the commit contains a file named
index.html (which would previously conflict with the generated index.html that belongs to the webrev itself).

Best regards,
Robin

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Commit messages:
 - Avoid raw file collisions with reserved names

Changes: https://git.openjdk.java.net/skara/pull/619/files
 Webrev: https://webrevs.openjdk.java.net/skara/619/webrev.00
  Issue: https://bugs.openjdk.java.net/browse/SKARA-398
  Stats: 28 lines in 2 files changed: 27 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/skara/pull/619.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/619/head:pull/619

PR: https://git.openjdk.java.net/skara/pull/619