maspsx doesn't handle forced .sbss via __attribute__((section(".sbss")))

[mkst]

Using the __attribute__ modifier e.g.

struct __Player Raziel __attribute__((section(".sbss")));

to force gcc to put symbols in the .sbss section results in the following assembly:

	.section .sbss,"aw",@progbits
	.align	2
Raziel:
	.space	1464

Currently maspsx expects bss/sbss to use .comm or .lcomm directives and so these symbols will not end up in sbss (and so will not be considered for any special $gp-related flows.

Whilst the nice solution would be to omit the attribute modifier when using gcc+maspsx+gnu as, it shouldn't be too hard to handle this (to make it easier to compare psyq vs maspsx)