[aarch64-port-dev ] RFR: Merge [v2]

[Anton Kozlov]

> This PR is a part of #5 and it merges recent changes from openjdk/jdk master. Few fixes are made to make the merge buildable and functional
> 
> * d81cca31ab7, 0ab1e1ccb7d -- revert "Import JDK-8234930 v2: Use MAP_JIT when allocating pages for code cache on macOS" to make a complete commit after (b41b3a949e3)
> f7c60d7c098 Merge remote-tracking branch 'upstream/master' into macos-aarch64-public -- have no conflicts
> 051357ef977 Fix merge -- replicates changes in os_bsd_aarch64 and fixes build
> 33c47611da3 Add missing include StubRoutines inline -- a missing part of f888accb52c
> b41b3a949e3 Import JDK-8234930 v3: Use MAP_JIT when allocating pages for code cache on macOS -- a complete change to introduce MAP_JIT, may change in future
> 
> It's also tests merge-style PR (https://github.com/openjdk/aarch64-port/pull/5#issuecomment-726893549). Let's see how it will be processed by SKARA tooling. Vanilla Github merge ability made commit with my personal email 499487333abcb0700e8d1403df778ddb65cc9886, probably something we would not like to have :)

Anton Kozlov has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase.

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Changes:
  - all: https://git.openjdk.java.net/aarch64-port/pull/6/files
  - new: https://git.openjdk.java.net/aarch64-port/pull/6/files/b41b3a94..b41b3a94

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=aarch64-port&pr=6&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=aarch64-port&pr=6&range=00-01

  Stats: 0 lines in 0 files changed: 0 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/aarch64-port/pull/6.diff
  Fetch: git fetch https://git.openjdk.java.net/aarch64-port pull/6/head:pull/6

PR: https://git.openjdk.java.net/aarch64-port/pull/6