Add 'ar' as a language supported by the Amiri font

It is used as the default in the Arabic Wikipedia, so it should be
used in jquery.webfonts, too.

Change-Id: I862e313add75e494fce9e85172b3b9ce869f3716

data/fontrepo/fonts/amiri/font.ini

@@ -1,5 +1,5 @@
 [Amiri]
-languages=arb*, fa
+languages=ar*, arb*, fa
 version=1.0.2
 license=OFL 1.1
 licensefile=OFL.txt
@@ -28,4 +28,4 @@ ttf=amiri-boldslanted.ttf
 eot=amiri-boldslanted.eot
 woff=amiri-boldslanted.woff
 fontstyle=italic
-fontweight=bold
+fontweight=bold