RFR: 8282407: Missing ')' in MacResources.properties

[Alexander Matveev]

- Fixed by adding missing ']'.
 - I changed '()' to '[]', since other error messages use '[]' and not '()'.

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Commit messages:
 - 8282407: Missing ')' in MacResources.properties

Changes: https://git.openjdk.java.net/jdk/pull/7797/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=7797&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8282407
  Stats: 6 lines in 3 files changed: 0 ins; 0 del; 6 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7797.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7797/head:pull/7797

PR: https://git.openjdk.java.net/jdk/pull/7797