split off --dylib from --jit in nanobench

This makes nanobench like the other tools.

Change-Id: I145cb559489588fa27f07d7e91b96105f7afcc81
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/388379
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Mike Klein <mtklein@google.com>
1 file changed