Add a binary ecpp-check.

* src/Makefile.am (bin_PROGRAMS): Add ecpp-check.
  (ecpp_check_LDADD, ecpp_check_SOURCES): New entries.
* src/params.h (evaluate_parameters_ecpp_check): Declare new function.
* src/params.c (evaluate_parameters_ecpp_check, print_help_ecpp_check):
  New functions.
  (print_f_options): Adapt help text to work for all binaries.