plot_utils: add a "count" y-label to the histogram plot

Xin was confused about the histogram plot.  It doesn't look like an
histogram.  Add a Y-label explaining that it is a count.  Add support
for y-labels to post_plot_setup() accordingly.

Change-Id: I1be871e89dead9f35996bb89df68e088521c0349
1 file changed
tree: d4cfda35a079842675b583b6c018cd0c4640876f
  1. cr2/
  2. doc/
  3. hooks/
  4. tests/
  5. .dir-locals.el
  6. .gitignore
  7. README
  8. setup.cfg