[code-reflection] RFR: Added config bit help also forced txfmr to take a lookup

[Gary Frost]

I kept forgetting the config bit names. So added HELP


java @.run ffi-opencl -DHAT=HELP life
PLATFORM/P                                0-3 FFI ONLY platform id (0-15)
DEVICE/D                                  4-7 FFI ONLY device id (0-15)
MINIMIZE_COPIES/MC                        8   FFI ONLY Try to minimize copies
TRACE/T                                   9   FFI ONLY trace code
PROFILE/P                                10   FFI ONLY Turn on profiling
SHOW_CODE/SC                             11   Show generated code (PTX/OpenCL/CUDA)
SHOW_KERNEL_MODEL/SKM                    12   Show (via OpWriter) Kernel Model

Also note the short forms 

So 

java @.run ffi-opencl -DHAT=MC .... === java @.run ffi-opencl -DHAT=MINIMIZE_COPIES

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Commit messages:
 - Added config bit help also forced txfmr to take a lookup

Changes: https://git.openjdk.org/babylon/pull/823/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=823&range=00
  Stats: 218 lines in 17 files changed: 132 ins; 6 del; 80 mod
  Patch: https://git.openjdk.org/babylon/pull/823.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/823/head:pull/823

PR: https://git.openjdk.org/babylon/pull/823