[rfc] removing lesstif build dependency

[Matthias Klose]

Matthias Klose schrieb:
> Trying to get rid of the lesstif build dependency in icedtea6/openjdk6; Dalibor
> pointed out this patch from jdk7 (not included in the attached diff). Some extra
> bits are needed to build without lesstif.
> 
>   Matthias
> 
> upstream patch:
>   http://mail.openjdk.java.net/pipermail/awt-dev/2008-May/000233.html
>   http://hg.openjdk.java.net/jdk7/awt/jdk/rev/38e32b2db431

checking this in, and filing a bug report about enabling that conditionally.
Even if we do enable this conditionally, the code tries to dlopen a library with
soversion 3, not 2 as lesstif provides. Didn't try to build with OpenMotif,
because this again is considered to have a non FSG compliant license, which
doesn't help much.

  Matthias