[oe] [PATCH] xfce_session_4.6.{1, 2}: explicitly pass the path of `iceauth`

[Khem Raj]

> That it is not a build time dependency and therefore only needed during
> runtime. I thought the pathes of programs during compile time do not
> matter since the build host and the host where it gets installed differ
> when cross compiling.

OK I see its a runtime dependency( not compile time/configure time) then 
its ok but I think we need to have iceauth in RDEPENDS too I think.