suppr: Support has_data_member and has_data_member_regexp properties

suppr: Support has_data_member and has_data_member_regexp properties

In the [supress_type] directive, this patch adds support for two new
properties:

* has_data_data_member = {foo, bar, blah}
  Suppresses change reports involving a type which has data members
  with names specified by the value of this property.

* has_data_member_regexp = some-regexp
  Suppresses change reports involving a type which has data members
  with names specified by the regular expression given as a value of
  this property.

	* include/abg-fwd.h (string_set_type): Define new typedef.
	* src/abg-suppression-priv.h
	* include/abg-suppression.h
	(type_suppression::{get,set}_potential_data_member_names[_regex_str]):
	Declare new data member.
	(type_suppression::priv::{potential_data_members_,
	potential_data_members_regex_str_,
	potential_data_members_regex_}): Define new data members.
	(type_suppression::priv::{get,set}_potential_data_member_names_regex):
	Define new member functions.
	* src/abg-suppression.cc
	(type_suppression::{get,set}_potential_data_member_names): Define new
	member functions.
	(type_suppression::{get,set}_potential_data_member_names_regex_str):
	Likewise.
	(type_suppression::suppresses_diff): Implement suppression using
	the new "has_data_member" and "has_data_member_regexp" properties.
	(read_type_suppression): Support parsing the new "has_data_member"
	and "has_data_member_regexp" properties of the type suppression
	directive.
	* tests/data/test-diff-suppr/has-data-member-[1-7].suppr: New
	suppression specifications for test purposes.
	* tests/data/test-diff-suppr/test-has-data-member-output-{1,2}.txt:
	New reference test outputs.
	* tests/data/test-diff-suppr/test-has-data-member-v{0,1}.cc:
	Source code of new input binary tests.
	* tests/data/test-diff-suppr/test-has-data-member-v{0,1}.o: New
	binary test inputs.
	* tests/data/Makefile.am: Add the test inputs below to source
	distribution.
	* tests/test-diff-suppr.cc (in_out_specs): Add the new test inputs
	above to this test harness.

Signed-off-by: Dodji Seketeli <dodji@redhat.com>