PR jit/63854: Fix memory leaks within context/pass_manager/dump_manager

PR jit/63854: Fix memory leaks within context/pass_manager/dump_manager

gcc/ChangeLog:
	PR jit/63854
	* config/alpha/alpha.c (alpha_option_override): Remove static from
	"handle_trap_shadows_info" and "align_insns_info".
	* config/i386/i386.c (ix86_option_override): Likewise for
	"insert_vzeroupper_info".
	* config/rl78/rl78.c (rl78_asm_file_start): Likewise for
	"rl78_devirt_info" and "rl78_move_elim_info".
	* config/rs6000/rs6000.c (rs6000_option_override): Likewise for
	"analyze_swaps_info".
	* context.c (gcc::context::~context): New.
	* context.h (gcc::context::~context): New.
	* dumpfile.c (dump_files): Add "false" initializers for new field
	"owns_strings".
	(gcc::dump_manager::~dump_manager): New.
	(gcc::dump_manager::dump_register): Add param "take_ownership".
	* dumpfile.h (struct dump_file_info): Add field "owns_strings".
	(gcc::dump_manager::~dump_manager): New.
	(gcc::dump_manager::dump_register): Add param "take_ownership".
	* pass_manager.h (gcc::pass_manager::operator delete): New.
	(gcc::pass_manager::~pass_manager): New.
	* passes.c (pass_manager::register_one_dump_file): Pass "true" to
	new "owns_strings" argument to dump_register.
	(pass_manager::operator delete): New.
	(delete_pass_tree): New function.
	(pass_manager::~pass_manager): New.
	* statistics.c (statistics_early_init): Pass "false" to
	new "owns_strings" argument to dump_register.
	* toplev.c (toplev::finalize): Clean up the context and thus the
	things it owns.

From-SVN: r217793