[lworld] RFR: 8288135: [lworld] Implement HotSpot flag -XX:+EnablePrimitiveClasses [v7]

[David Simms]

> Runtime component of -XX:+EnablePrimitiveClasses switch

David Simms has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 18 commits:

 - Disable EnablePrimitiveClasses by default
 - Explictly flag more tests
 - Merge branch 'lworld' into 8288135
 - jdk_valhalla tests
 - Merge branch 'lworld' into 8288135
 - Further test fixes
 - Merge branch 'lworld' into 8288135
 - Merge branch 'lworld' into 8288135
 - CF version bump
 - Merge branch 'lworld' into 8288135
   
   # Conflicts:
   #	test/hotspot/jtreg/compiler/valhalla/inlinetypes/TestC2CCalls.java
   #	test/hotspot/jtreg/compiler/valhalla/inlinetypes/TestDeoptimizationWhenBuffering.java
   #	test/hotspot/jtreg/compiler/valhalla/inlinetypes/TestNewAcmp.java
   #	test/hotspot/jtreg/compiler/valhalla/inlinetypes/TestTrivialMethods.java
   #	test/hotspot/jtreg/compiler/valhalla/inlinetypes/TestUnloadedReturnTypes.java
   #	test/hotspot/jtreg/runtime/valhalla/inlinetypes/InlineOops.java
   #	test/hotspot/jtreg/runtime/valhalla/inlinetypes/InlineTypeDensity.java
   #	test/hotspot/jtreg/runtime/valhalla/inlinetypes/ValueTearing.java
 - ... and 8 more: https://git.openjdk.org/valhalla/compare/9290cc97...5ee270c2

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Changes: https://git.openjdk.org/valhalla/pull/727/files
 Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=727&range=06
  Stats: 1347 lines in 242 files changed: 816 ins; 76 del; 455 mod
  Patch: https://git.openjdk.org/valhalla/pull/727.diff
  Fetch: git fetch https://git.openjdk.org/valhalla pull/727/head:pull/727

PR: https://git.openjdk.org/valhalla/pull/727