PR bootstrap/44509
	* c-config-lang.in (gtfiles): Add c-family/c-cppbuiltin.c.
	* c-family/c-cppbuiltin.c: Include gt-c-family-c-cppbuiltin.h.
	(lazy_hex_fp_values, lazy_hex_fp_value_count): Add GTY(()) markers.
	(lazy_hex_fp_value, builtin_define_with_hex_fp_value): Use
	ggc_strdup instead of xstrdup.

	* gcc.dg/pr44509.c: New test.

From-SVN: r160729