[jdk17u-dev] RFR: 8272608: java_lang_System::allow_security_manager() doesn't set its initialization flag

[Aleksey Shipilev]

Clean backport to fix the minor performance bug.

Additional testing:
 - [x] Linux x86_64 fastdebug `tier1`

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Commit messages:
 - Backport 08f0be8388914901ac40525ed995136ce020f432

Changes: https://git.openjdk.org/jdk17u-dev/pull/843/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=843&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8272608
  Stats: 1 line in 1 file changed: 1 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/843.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev pull/843/head:pull/843

PR: https://git.openjdk.org/jdk17u-dev/pull/843