RFR: 8339890: javax/script/ProviderTest.sh ignore vm flags

[Sonia Zaldana Calles]

Hi all, 

This PR addresses [8339890](https://bugs.openjdk.org/browse/JDK-8339890) where vm flags specified via javaopts were getting ignored. I added the flags to the test. 

Thanks, 
Sonia

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Commit messages:
 - 8339890: javax/script/ProviderTest.sh ignore vm flags

Changes: https://git.openjdk.org/jdk/pull/21915/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=21915&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8339890
  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/21915.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21915/head:pull/21915

PR: https://git.openjdk.org/jdk/pull/21915