Add Qt specific expected results for tests introduced in r73385 and r73398.
Compared to Mac png files and Mac expected files.

* platform/qt/fast/html/marquee-scrollamount-expected.checksum: Added.
* platform/qt/fast/html/marquee-scrollamount-expected.png: Added.
* platform/qt/fast/html/marquee-scrollamount-expected.txt: Added.
* platform/qt/fast/overflow/overflow-rtl-vertical-expected.checksum: Added.
* platform/qt/fast/overflow/overflow-rtl-vertical-expected.png: Added.
* platform/qt/fast/overflow/overflow-rtl-vertical-expected.txt: Added.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@73439 268f45cc-cd09-0410-ab3c-d52691b4dbfc