RFR: 8345267: Fix memory leak in JVMCIEnv dtor [v2]

[Doug Simon]

> The `ALLOW_C_FUNCTION` macro takes the identifier for the relevant C function, followed by a statement containing the use as additional (variadic) macro args. This PR fixes a use of this macro where the leading identifier arg was being omitted.

Doug Simon has refreshed the contents of this pull request, and previous commits have been removed. The incremental views will show differences compared to the previous content of the PR. The pull request contains one new commit since the last revision:

  fix use of ALLOW_C_FUNCTION

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Changes:
  - all: https://git.openjdk.org/jdk/pull/22471/files
  - new: https://git.openjdk.org/jdk/pull/22471/files/c789f049..35c0c3de

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=22471&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=22471&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/22471.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22471/head:pull/22471

PR: https://git.openjdk.org/jdk/pull/22471