[jdk17u-dev] RFR: 8307147: [x86] Dangling pointer warning for Assembler::_attributes

[Ben Taylor]

Backport is not clean because https://bugs.openjdk.java.net/browse/JDK-8301498 has not been backported. 

Required to build with GCC 13.

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Commit messages:
 - 8307147: [x86] Dangling pointer warning for Assembler::_attributes

Changes: https://git.openjdk.org/jdk17u-dev/pull/1575/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1575&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8307147
  Stats: 29 lines in 4 files changed: 21 ins; 5 del; 3 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/1575.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/1575/head:pull/1575

PR: https://git.openjdk.org/jdk17u-dev/pull/1575