libsmartcols: build filter scanner and parser header files too

libsmartcols: build filter scanner and parser header files too

* if .c and .h generated in the same time then bison does not duplicate
  declarations from .h in .c

* it seems better to generate everything and exclude header files from
  git

* the patch excludes autotools YACC support, we need reentrant parser
  with some cool features from bison; autotools assumes POSIX
  compatibility for YACC (bison -y), we do not need it.

Signed-off-by: Karel Zak <kzak@redhat.com>