[patch] Encode the libgcj soversion in libjava's private dir

[Andrew Haley]

Matthias Klose writes:
 > The following patch encodes the libgcj soversion in the name of the private
 > libjava subdirectory. Currently a directory gcj-X.Y.Z is used, the patch changes
 >  that to gcj-X.Y.Z-N. This allows installation of multiple gcj versions within
 > the same prefix, when the soname changes, but not the gcj version number. This
 > usually happens, if vendors backport more recent versions of libjava to stable
 > branches (as seen with Fedora, Debian and Ubuntu). There should not be any
 > references to the private subdirectory, besides from libjava itself. The patch
 > is in use without problems in the gcj builds for Debian and Ubuntu, and tested
 > on i686-linux on the trunk.
 > 
 > Ok for trunk?

I can't see anything wrong with it, but I'll wait for an ACK from Tom
Tromey.

Andrew.