RFR: 8243066 - Move VM_INTRINSICS_DO into its own vmIntrinsics.hpp file

[John Tortugo]

Relates to: https://bugs.openjdk.java.net/browse/JDK-8243066
Tested on: x86_64 {windows, linux, os x} x {jdk-tier1-part1..3, hotspot-tier1-gc}

Move vmIntrinsics code out of vmSymbols.[c|h]pp into its own files.

I closed a [previous PR](https://github.com/openjdk/jdk/pull/160) I had for this same work item because I accidentally
pushed commits to the same branch using different author names and the PR checker was complaining about that - I didn't
want to force push (amend) commits on the previous branch anymore.

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Commit messages:
 - Refactor vmIntrinsics out of vmSymbols

Changes: https://git.openjdk.java.net/jdk/pull/226/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=226&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8243066
  Stats: 3390 lines in 4 files changed: 1725 ins; 1665 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/226.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/226/head:pull/226

PR: https://git.openjdk.java.net/jdk/pull/226