RFR: JDK-8304884: Update Bytecodes data to be mostly compile time constants [v3]

[Justin King]

> Change uses a few tricks to make most of the data in Bytecodes compile time constant, avoiding the overhead during VM initialization. `Bytecodes:_flags` likely can be made compile time constant as well using `constexpr` tricks, but that is out of scope for this specific PR.

Justin King has updated the pull request incrementally with two additional commits since the last revision:

 - Replace XX with def and add _DO suffix
   
   Signed-off-by: Justin King <jcking at google.com>
 - Fix compiler warnings
   
   Signed-off-by: Justin King <jcking at google.com>

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/13179/files
  - new: https://git.openjdk.org/jdk/pull/13179/files/d1a8dbd1..cf71fcdd

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=13179&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=13179&range=01-02

  Stats: 266 lines in 1 file changed: 0 ins; 0 del; 266 mod
  Patch: https://git.openjdk.org/jdk/pull/13179.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13179/head:pull/13179

PR: https://git.openjdk.org/jdk/pull/13179