RFR: 7903805: Fix a typo in IAE message thrown by com.sun.tdk.signaturetest.updater.Command::validate

[Dmitry Bessonov]

Method com.sun.tdk.signaturetest.updater.Command::validate contains a typo in the IAE's message:

throw new IllegalArgumentException("Class defenition should be specified");

it should be "_definition_"

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Commit messages:
 - 7903805: Fix a typo in IAE message thrown by com.sun.tdk.signaturetest.updater.Command::validate

Changes: https://git.openjdk.org/sigtest/pull/5/files
  Webrev: https://webrevs.openjdk.org/?repo=sigtest&pr=5&range=00
  Issue: https://bugs.openjdk.org/browse/CODETOOLS-7903805
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/sigtest/pull/5.diff
  Fetch: git fetch https://git.openjdk.org/sigtest.git pull/5/head:pull/5

PR: https://git.openjdk.org/sigtest/pull/5