Analysis demo graph using sharp-edged boxes for source files

As Raul pointed out, to avoid confusion for a color-blind audience, or
when its printed in black-and-white, its best to not just base the
source-build distinction in the graph based on color.

With this commit, the source files have sharp edges and the built
files have round edges.

1 files changed, 0 insertions, 0 deletions

diff --git a/img/make-demo-1.pdf b/img/make-demo-1.pdf
new file mode 100644
index 0000000..b0cfd86
--- /dev/null
+++ b/img/make-demo-1.pdf