RFR: 8292917: [JVMCI] Extend InstalledCode API to make an nmethod non entrant. [v2]

[Doug Simon]

> The existing `InstalledCode.invalidate()` method not only makes the underlying nmethod non-entrant but also immediately deoptimizes all current activations of the nmethod.
> In some scenarios, it's useful to be able to make the nmethod non-entrant but let existing activations complete. For example, which installing new code in Truffle tiered compilation.
> This PR adds `InstalledCode.invalidate(boolean deoptimize)` for that purpose.

Doug Simon has updated the pull request incrementally with one additional commit since the last revision:

  fix compilation error

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Changes:
  - all: https://git.openjdk.org/jdk/pull/10039/files
  - new: https://git.openjdk.org/jdk/pull/10039/files/9a9ad287..a71c27cc

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=10039&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=10039&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/10039.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10039/head:pull/10039

PR: https://git.openjdk.org/jdk/pull/10039