RFR: JDK-8287867: Bad merge of jdk/test/lib/util/ForceGC.java causing test compilation error

[Mandy Chung]

A typo in ForceGC.java causes several test failing due to compilation error.

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Commit messages:
 - JDK-8287867: Bad merge of jdk/test/lib/util/ForceGC.java causing compilation error

Changes: https://git.openjdk.java.net/jdk/pull/9043/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=9043&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8287867
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/9043.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/9043/head:pull/9043

PR: https://git.openjdk.java.net/jdk/pull/9043