Fix 1261 psd 0.27 (0.27->master)

[clanmills]

See #1261

[piponazo]

It looks like reference file exiv2-test.out needs to be also updated after the addition of the new test images.

[ERROR] The output of the testcase mismatch the reference
[INFO] The output has been saved to file /home/travis/build/Exiv2/exiv2/test/tmp/exiv2-test.out
[INFO] simply_diff:
/home/travis/build/Exiv2/exiv2/test/data/exiv2-test.out: 9212 lines
/home/travis/build/Exiv2/exiv2/test/tmp/exiv2-test.out: 8606 lines
The first mismatch is in line 131:
< File  1/16: exiv2-empty.jpg
> File  1/15: exiv2-empty.jpg