[code-reflection] Integrated: Added OpWrapper for CoreOp.NegOp (needed for blackscholes)

[Gary Frost]

Blackscholes example failed when generating CUDA/OpenCL via C99HatBuilder

We were missing OpWrapper for CoreOp.NegOp (unary - ) 

This PR fixes that and adds balckscholes to new `bld` script

There is still a code-gen issue stemming from 

 @CodeReflection
    public static float CND(float input) {
        // yada 
        if (input >= 0f) {
            return 1f - part1 * part2;
        }else{
           return part1 * part2;
        }
    } 

Which incorrectly generates OpenCL

    if(input>=0.0){
        return 1.0-part1*part2;
    }else{
        return part1*part2;
    }
    return;  //<----------------   ???

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

Commit messages:
 - Added OpWrapper for CoreOp.NegOp (needed for blackscholes)
 - Added OpWrapper C99 gen for Core.NegOp (needed for blackscholes)

Changes: https://git.openjdk.org/babylon/pull/255/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=255&range=00
  Stats: 457 lines in 9 files changed: 257 ins; 75 del; 125 mod
  Patch: https://git.openjdk.org/babylon/pull/255.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/255/head:pull/255

PR: https://git.openjdk.org/babylon/pull/255