test-alt-dwarf: Add missing dwz alt-debug file

test-alt-dwarf: Add missing dwz alt-debug file

It seems I forgot to add a dwz alt-debug file to the test material
included in the previous commit.

Fixed thus.

	* tests/data/test-alt-dwarf-file/libstdc++/libstdc++-report-1.txt:
	New reference test output.
	* tests/data/test-alt-dwarf-file/libstdc++/usr/lib/debug/.dwz/gcc-12.1.1-1.fc37.x86_64:
	New dwz alt-debug info file.
	* tests/data/Makefile.am: Add the test material above to source
	distribution.

Signed-off-by: Dodji Seketeli <dodji@redhat.com>