[lworld] RFR: 8377097: [lworld] runtime/valhalla/inlinetypes/classloading/ConcurrentClassLoadingTest.java fails assert(acmp_maps_array->length() == map->length()) failed: sanity

[Matias Saavedra Silva]

This assert was failing with concurrent class loading likely due to `map` being a naked oop that was GC'd before the assert was reached. Correcting `map` to `map_h` should fix the issue.

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Commit messages:
 - 8377097: [lworld] runtime/valhalla/inlinetypes/classloading/ConcurrentClassLoadingTest.java fails assert(acmp_maps_array->length() == map->length()) failed: sanity

Changes: https://git.openjdk.org/valhalla/pull/2111/files
  Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=2111&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8377097
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/valhalla/pull/2111.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/2111/head:pull/2111

PR: https://git.openjdk.org/valhalla/pull/2111