Add a testcase for PR binutils/26160

[Alan Modra]

On Mon, Oct 31, 2022 at 09:24:07AM -0700, H.J. Lu wrote:
> Here is the patch to run the test.  But it failed with
> 
> readelf: Warning: Cannot fetch indexed address: the .debug_addr
> section is missing
> 
> Is this warning valid?

Well, yes, because according to https://gcc.gnu.org/wiki/DebugFission
.debug_addr is found in the "linked binary".  I think the testcase is
incomplete without that object file.

-- 
Alan Modra
Australia Development Lab, IBM