RFR: 8257886 Build issue in macOS 10.14

[Alexey Ushakov]

Replaced detection logic with one constant because we have the same max texture size (16384) for all macs (https://developer.apple.com/metal/Metal-Feature-Set-Tables.pdf)

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Commit messages:
 - 8257886 Build issue in macOS 10.14
 - Merge branch 'master' of github.com:openjdk/lanai into openjdk_lanai_avu
 - 8242925 J2DDemo - Anti-Aliased rendering with Metal differs as compared to OpenGL

Changes: https://git.openjdk.java.net/lanai/pull/142/files
 Webrev: https://webrevs.openjdk.java.net/?repo=lanai&pr=142&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8257886
  Stats: 14 lines in 3 files changed: 0 ins; 9 del; 5 mod
  Patch: https://git.openjdk.java.net/lanai/pull/142.diff
  Fetch: git fetch https://git.openjdk.java.net/lanai pull/142/head:pull/142

PR: https://git.openjdk.java.net/lanai/pull/142