morello, testsuite: Fix up morello-stubs-static.d

The expected disassembly for this test is testing for the wrong thing: it
expects the adrp immediate to be zero-extended instead of sign-extended, which
is incorrect.  That shows up as a test failure after fixing the disassembly in
the previous patch.  This patch fixes the test.
diff --git a/ld/testsuite/ld-aarch64/morello-stubs-static.d b/ld/testsuite/ld-aarch64/morello-stubs-static.d
index d7627dc..dd5f61f 100644
--- a/ld/testsuite/ld-aarch64/morello-stubs-static.d
+++ b/ld/testsuite/ld-aarch64/morello-stubs-static.d
@@ -45,7 +45,7 @@
  f000014:	d503201f 	nop
 
 000000000f000018 <__foo_c64a64_veneer>:
- f000018:	90f88090 	adrp	c16, 100010000 <___veneer\+0xf100ffd8>
+ f000018:	90f88090 	adrp	c16, 10000 <foo>
  f00001c:	02000210 	add	c16, c16, #0x0
  f000020:	c2c21200 	br	c16
  f000024:	00000000 	.*