parser: fix Makefile hardcoded paths to flex and bison
The hardcoded paths for flex and python can break builds on systems where those tools are stored in an alternate location. Use which to lookup where flex and bison are available.
This fixes issue #4 (closed) Nominated for 2.10..master
Signed-off-by: John Johansen john.johansen@canonical.com
Edited by John Johansen