PR binutils/33485: LD/testsuite: Also XFAIL `ns32k-*-*' targets

PR binutils/33485: LD/testsuite: Also XFAIL `ns32k-*-*' targets

NS32k targets also use the a.out archive format, which suffers from PR
binutils/33485 where symbol indexes in a.out thin archives are missing
symbols for subsequent members.  This affects `ns32k-pc532-lites*',
`ns32k-pc532-mach*', and `ns32k-pc532-ux*' targets in particular; other
NS32k targets appear defunct.  Add suitable XFAIL annotation, removing
failures such as:

ns32k-pc532-lites  -FAIL: Thin archive link
ns32k-pc532-lites  -FAIL: Regular archive plus thin link
ns32k-pc532-lites  -FAIL: Thin archive plus regular link
ns32k-pc532-lites  -FAIL: Thin archive plus thin link