Properly mark lambdas in GCOV (PR gcov-profile/86109).

Properly mark lambdas in GCOV (PR gcov-profile/86109).

2018-10-03  Martin Liska  <mliska@suse.cz>

	PR gcov-profile/86109
	* coverage.c (coverage_begin_function): Do not
	mark lambdas as artificial.
	* tree-core.h (struct GTY): Remove tm_clone_flag
	and introduce new lambda_function.
	* tree.h (DECL_LAMBDA_FUNCTION): New macro.
2018-10-03  Martin Liska  <mliska@suse.cz>

	PR gcov-profile/86109
	* parser.c (cp_parser_lambda_declarator_opt):
	Set DECL_LAMBDA_FUNCTION for lambdas.
2018-10-03  Martin Liska  <mliska@suse.cz>

	PR gcov-profile/86109
	* g++.dg/gcov/pr86109.C: New test.

From-SVN: r264806