RFR: 8282507: Add LICENSE file for hsdis

[Man Cao]

Hi all,

Could anyone help review the addition of LICENSE file to hsdis directory?

-Man

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Commit messages:
 - Add LICENSE file for hsdis

Changes: https://git.openjdk.java.net/jdk/pull/7649/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=7649&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8282507
  Stats: 35 lines in 1 file changed: 35 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7649.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7649/head:pull/7649

PR: https://git.openjdk.java.net/jdk/pull/7649