[lworld] RFR: 8369532: [lworld] Increase compilation memory limit for TestValueConstruction.java

[Manuel Hässig]

This PR increases the compilation memory limit for subtasks of TestValueConstruction.java, which oom during JIT compilation in the CI, to 2G while I am working on a more fundamental fix. The new limit and its sparse application is so that the CI still detects further regressions, so this is preferable to a full problem list.

Testing:
 - [x] repeatedly run failing configurations with a 2G memory limit.

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Commit messages:
 - Increase MemLimit for a subset of TestValueConstruction

Changes: https://git.openjdk.org/valhalla/pull/1673/files
  Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=1673&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8369532
  Stats: 6 lines in 1 file changed: 6 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/valhalla/pull/1673.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1673/head:pull/1673

PR: https://git.openjdk.org/valhalla/pull/1673