RFR: JDK-8303646: [JVMCI] Add possibility to lookup ResolvedJavaType from jclass. [v2]

[Tomáš Zezula]

> This pull request adds a `jdk.vm.ci.hotspot.HotSpotJVMCIRuntime#asResolvedJavaType(long hotspot_jclass_value)` method, which converts  a HotSpot heap JNI `hotspot_jclass_value` to a `jdk.vm.ci.meta.ResolvedJavaType`.

Tomáš Zezula 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:

  JDK-8303646: Add possibility to lookup ResolvedJavaType from HotSpot heap JNI jclass.

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Changes:
  - all: https://git.openjdk.org/jdk/pull/12878/files
  - new: https://git.openjdk.org/jdk/pull/12878/files/0e4b2f10..336144a0

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=12878&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=12878&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/12878.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/12878/head:pull/12878

PR: https://git.openjdk.org/jdk/pull/12878