[master] RFR: 8319135: [Lilliput] Fix objArrayOop gtest [v2]

[Roman Kennke]

> The objArrayOop gtest is broken with Lilliput. The test checks the size of obj-arrays under various settings (coops, ccp) and different alignments, but it does not consider UseCompactObjectHeaders, yet.
> 
> The change adds handling of UseCompactObjectHeaders.
> 
> Testing:
>  - [x] gtest:objArrayOop (+UCOH)
>  - [x] gtest:objArrayOop (-UCOH)

Roman Kennke has updated the pull request incrementally with one additional commit since the last revision:

  Fix comments

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Changes:
  - all: https://git.openjdk.org/lilliput/pull/114/files
  - new: https://git.openjdk.org/lilliput/pull/114/files/02b5da1d..170bc4ec

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=lilliput&pr=114&range=01
 - incr: https://webrevs.openjdk.org/?repo=lilliput&pr=114&range=00-01

  Stats: 6 lines in 1 file changed: 0 ins; 0 del; 6 mod
  Patch: https://git.openjdk.org/lilliput/pull/114.diff
  Fetch: git fetch https://git.openjdk.org/lilliput.git pull/114/head:pull/114

PR: https://git.openjdk.org/lilliput/pull/114