autotools: use stamp file to build filter parser, improve portability

autotools: use stamp file to build filter parser, improve portability

* use .stamp files to generate .c and .h by only one flex and bison call

* use bison --defines=HEADER rather than --header=, the --header is
  supported also by old bison version (like common bison 3.0.4)

* make sure there is defined dependence between the scanner and parser
  .c and .h files (scanner need header from parser and vice-versa)

* distribute .stamp files to avoid flex and bison for people who use
  sources from tarball (we distribute generated source files)

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