make binary-dist on Solaris 10.

[Karel Gardas]

Folks,

I'm trying to kind of resurrect Solaris 10 support. Got to `make 
binary-dist' already but now this fails with:

cd bindistprep && "/usr/sfw/bin/gtar" hcf - -T ../bindist-list | bzip2 
-c > ../bindistprep/ghc-7.8.20140130-i386-unknown-solaris2.tar.bz2
/usr/sfw/bin/gtar: ghc-7.8.20140130/compiler/stage2/doc: Cannot stat: No 
such file or directory
/usr/sfw/bin/gtar: Error exit delayed from previous errors
mv bindistprep/*.tar.bz2 .

I'd just like to ask here, any idea what tool is responsible for 
generating this doc content in compiler's stage2 dir? My idea is that 
some tool(s) is missing on Solaris 10, configure detects this, general 
build is fine then, but bindist counts with the `doc' dir populated. So 
just let me know into what direction I shall look...

Thanks!
Karel