zpu: first sign of being able to build a .S file

zpu: first sign of being able to build a .S file

clang  -ccc-host-triple zpu-none-none test.c -S

oyvind@fiend:~/workspace/lbuild$ cat test.s
	.file	"test.c"
	.text
	.globl	foo
	.align	2
	.type	foo,@function
$tmp0:
	.size	foo, ($tmp0)-foo

	.type	c,@object
	.comm	c,4,4
	.type	b,@object
	.comm	b,4,4

oyvind@fiend:~/workspace/lbuild$ cat test.c
int b;
int c;
int foo(void)
{
  return c+b;
}

Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>