[ft] Rendering differences between 2.3.12 and 2.5.3

[Alexei Podtelezhnikov]

> If the text rendered by freetype is only a little bit wider than it
> used to be, whole words might suddenly end up on a new line
> which can mess up the whole layout.

You've got to admit that 2.5.3 looks better. :)
Yes advances for emboldened text changed,
but ultimately Freetype is not a text layout engine,
so *you* can use old advances if you wish.

This is the change that you want to undo for yourself
http://git.savannah.gnu.org/cgit/freetype/freetype2.git/commit/?id=cea9d7a6820bf7cca8d79d813908ce085a3d3d5d