Unreviewed GTK gardening.

Adding expectations for a couple of flaky crashers on the debug builder.
Adding flaky failure expectations for a couple of SVG animations tests.
Adding failure expectation for the SVG test introduced in 145541, failing due to disabled subpixel layout.

* platform/gtk/TestExpectations:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@145682 268f45cc-cd09-0410-ab3c-d52691b4dbfc