complibs/ppl: fix 0.11-0.11.2 to compile with --disable-shared

PPL 0.11 (through 0.11.2) had a small bug where it still tried to build
and test its Java interface even when shared libraries are disabled.
Since that's exactly what ct-ng does, it explodes.

This is the patch from the PPL authors (see final link below).

More information can be found in these messages/threads:

Anthony's initial report and analysis with Yann:
http://www.cygwin.com/ml/crossgcc/2011-05/msg00046.html

Ron Flory hit the same problem:
http://www.cygwin.com/ml/crossgcc/2011-05/msg00054.html

Anthony's report to the ppl-devel list:
http://www.cs.unipr.it/pipermail/ppl-devel/2011-May/017450.html

Roberto's reply with a link to the fix in the PPL git repo:
http://www.cs.unipr.it/pipermail/ppl-devel/2011-May/017455.html

Signed-Off-By: Anthony Foiani <anthony.foiani@gmail.com>

 # Menu for the native gdbserver

 config GDB_GDBSERVER

     bool

     prompt "gdbserver"

     default n

     depends on ! BARE_METAL

     help

       Build and install a gdbserver for the target, to run on the target.

 if GDB_GDBSERVER

 config GDB_GDBSERVER_STATIC

     bool

     prompt "Build a static gdbserver"

     default y

     help

       In case you have trouble with dynamic loading of shared libraries,

       you will find that a static gdbserver comes in handy.

 endif # GDB_GDBSERVER

 if BARE_METAL

 comment "In bare-metal, you'll need to   "

 comment "provide your own gdbserver stub."

 endif # BARE_METAL