[Fontconfig] another fonts.conf serif alias

[Eivind Magnus Hvidevold]

I'm using this in my fonts.conf; it fixes problems with
opera and news.zdnet.co.uk for me (on LFS 4.1)..

<match target="pattern">
	<test qual="any" name="family">
		<string>ms sans serif</string>
	</test>
	<edit name="family" mode="assign">
		<string>sans-serif</string>
	</edit>
</match>

EMH