RFR: 8293672: Update freetype md file

[Damon Nguyen]

Update the freetype md file with the newly generated md file from attribution tool. The new format slightly differs from the previous version when separating different licenses. Added logic for combining of copyright lines and support for other licenses such as MIT.

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Commit messages:
 - Update md file

Changes: https://git.openjdk.org/jdk/pull/10561/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=10561&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8293672
  Stats: 96 lines in 1 file changed: 54 ins; 13 del; 29 mod
  Patch: https://git.openjdk.org/jdk/pull/10561.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10561/head:pull/10561

PR: https://git.openjdk.org/jdk/pull/10561