Set dependency for expression-parser.hh

Automake doesn't realize expression-parser.hh must be generated before the
files depending on it.

Signed-off-by: Morten Hustveit <morten.hustveit@gmail.com>
Added autotools generated files

This might allow compiling on machines lacking the most recent tools.

Signed-off-by: Morten Hustveit <morten.hustveit@gmail.com>