RFR: 8288078: linux-aarch64-optimized build fails in Tier5 after JDK-8287567

[Andrew Haley]

Because PRODUCT is defined in 'optimized' builds, this needs to be surrounded by ASSERT ifdefs, not PRODUCT.

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Commit messages:
 - 8288078: AArch64: linux-aarch64-optimized build fails in Tier5 after JDK-8287567
 - Merge https://github.com/openjdk/jdk into new-master
 - Merge https://github.com/openjdk/jdk into new-master
 - Merge branch 'master' of https://github.com/openjdk/jdk into new-master
 - Merge https://github.com/openjdk/jdk into new-master
 - Revert "8287091: aarch64 : guarantee(val < (1ULL << nbits)) failed: Field too big for insn"
 - 8287091: aarch64 : guarantee(val < (1ULL << nbits)) failed: Field too big for insn

Changes: https://git.openjdk.java.net/jdk/pull/9103/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=9103&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8288078
  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/9103.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/9103/head:pull/9103

PR: https://git.openjdk.java.net/jdk/pull/9103