RFR: 8290065: [JVMCI] only check HotSpotCompiledCode stream is empty if installation succeeds

[Doug Simon]

Decoding the HotSpotCompiledCode stream (see [JDK-8289094](https://bugs.openjdk.org/browse/JDK-8289094)) can be short circuited if certain limits are encountered such as the code cache being full or `JVMCINMethodSizeLimit` being exceeded.
This PR omits the check that the complete stream has been read should be emitted if such a limit is hit.

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Commit messages:
 - only check empty HotSpotCompiledCode stream if CodeInstallResult == ok

Changes: https://git.openjdk.org/jdk/pull/9446/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=9446&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8290065
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/9446.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/9446/head:pull/9446

PR: https://git.openjdk.org/jdk/pull/9446