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[cc2-qbe] Small stetic changes to the output of qbe

After this commit we have a beatitul output for something like

$ cc1 | cc2
int
func(int a, int b)
{
	int c;

	c = a + c;
}
^D
export function h $func(h %a,h %b)
	%c h=	alloc2	2
	$.1 w=	load	%a
	$.2 w=	load	%c
	$.3 w=	add	$.1,$.2
		storew	$.3,%c
}

--- a/cc2/arch/qbe/code.c

+++ b/cc2/arch/qbe/code.c

@@ -191,19 +191,22 @@

 {

 	Symbol *p;

 	Type *tp;

+	char *sep;

 	if (curfun->kind == GLOB)

 		fputs("export ", stdout);

-	printf("function %s %s(\n", size2asm(&curfun->rtype), symname(curfun));

+	printf("function %s %s(", size2asm(&curfun->rtype), symname(curfun));

-	for (p = locals; p && p->type.flags & PARF; p = p->next)

-		printf("\t%s %s,\n", size2asm(&p->type), symname(p));

+	for (sep = "", p = locals; p; p = p->next, sep = ",") {

+		if ((p->type.flags & PARF) == 0)

+			break;

+		printf("%s%s %s", sep, size2asm(&p->type), symname(p));

+	}

+	puts(")");

-	puts(")\n{");

-

 	for ( ; p && p->id != TMPSYM; p = p->next) {

 		tp = &p->type;

-		printf("\t%s %s= alloc%lld %lld\n",

+		printf("\t%s %s=\talloc%lld\t%lld\n",

 		       symname(p), size2asm(tp),

 		       (long long) tp->size, (long long) tp->align);

 	}