[jdk8u-ri] RFR: 8303031: Set .jcheck/conf version for jdk8u43

[Erik Joelsson]

The version field in .jcheck/conf needs to be updated for the new release.

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Commit messages:
 - JDK-8303031

Changes: https://git.openjdk.org/jdk8u-ri/pull/11/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk8u-ri&pr=11&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8303031
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk8u-ri/pull/11.diff
  Fetch: git fetch https://git.openjdk.org/jdk8u-ri pull/11/head:pull/11

PR: https://git.openjdk.org/jdk8u-ri/pull/11