[lworld] RFR: 8272400: [lworld] serviceability/sa/CDSJMapClstats.java fails: No suitable match for type of address

[Ioi Lam]

This is a fix in CDS and SA to get CDSJMapClstats.java (and a bunch of other SA tests) to pass:

- Implement skeletal `FlatArrayKlass` and `InlineKlass` types in SA
- Implement the CDS C++ vtable lookup of these two types.

After this fix, only 2 out of 191 tests in test/hotspot/jtreg/serviceability/ are still failing.

However, support of these two types are incomplete in SA, so programs that try to use the SA APIs to access VM internals will not work. The full SA support of inlined types will be done separately in https://bugs.openjdk.java.net/browse/JDK-8205036

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Commit messages:
 - 8272400: [lworld] serviceability/sa/CDSJMapClstats.java fails: No suitable match for type of address

Changes: https://git.openjdk.java.net/valhalla/pull/532/files
 Webrev: https://webrevs.openjdk.java.net/?repo=valhalla&pr=532&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8272400
  Stats: 126 lines in 6 files changed: 124 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/valhalla/pull/532.diff
  Fetch: git fetch https://git.openjdk.java.net/valhalla pull/532/head:pull/532

PR: https://git.openjdk.java.net/valhalla/pull/532