Add ULP error plot script

Simple script to visualize the output of the ulp test tool, e.g.

$ build/bin/ulp -e .0001 log 0.5 2.0 2345678 | math/tools/plot.py
1 file changed
tree: b198db3dfb87dee4cda4d855a007042c28ad1a94
  1. math/
  2. .gitignore
  3. config.mk.dist
  4. LICENSE
  5. Makefile
  6. README