Integrated: 8310832: [lw5] reflective creation of arrays of non-nullable types

[Vicente Romero]

adding support for reflective creation of arrays of non-nullable types

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Commit messages:
 - 8310832: [lw5] reflective creation of arrays of non-nullable types

Changes: https://git.openjdk.org/valhalla/pull/876/files
 Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=876&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8310832
  Stats: 78 lines in 8 files changed: 69 ins; 6 del; 3 mod
  Patch: https://git.openjdk.org/valhalla/pull/876.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/876/head:pull/876

PR: https://git.openjdk.org/valhalla/pull/876