* Cut down compile-time emitting static data as string literals

* Cut down compile-time emitting static data as string literals

This change drastically reduce compile time.  Apparently GCC optimizer
does not scale up well at all for long sequences of assignments into a
single array.

Nicolás Bértolo <nicolasbertolo@gmail.com>
Andrea Corallo  <akrl@sdf.org>

	* src/comp.c (gcc_jit_context_new_string_literal)
	(gcc_jit_block_add_assignment_op): New imports.
	(comp_t): New 'size_t_type' 'memcpy' fields.
	(emit_static_object): Define static objects using string literals
	and memcpy.
	(define_memcpy): New function.
	(Fcomp__init_ctxt): Define 'size_t_type' and 'memcpy'.