Prior to bc46724, we dropped several variants of DejaVu to save
space, including DejaVuSans-Oblique.ttf, to which I think this
is the equivalent. I believe the idea is that it's not worth
half a megabyte just to get tuned rendering of italics in the
installer environment (where they're rarely used anyway); AIUI
in the absence of a specific oblique/italic font face, freetype
will produce one by slanting the regular face.
Signed-off-by: Adam Williamson <awilliam@redhat.com>