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>
(transplanted from 139b85d70b623e51f7585e7c64ecb8c6a6cf4567)

Index: ltrace-0.5.3/configure

===================================================================

--- ltrace-0.5.3/configure

+++ ltrace-0.5.3/configure

@@ -78,7 +78,10 @@ fi

 rm -f conftest.c a.out

 CFLAGS='-g -O2'

-LIBS='-lelf -lsupc++ -liberty '

+LIBS='-lelf'

+[ -n "$HAVE_LIBSUPC__" ] && LIBS="$LIBS -lsupc++"

+[ -n "$HAVE_LIBIBERTY" ] && LIBS="$LIBS -liberty"

+

 INSTALL='install -c'

 iquote='-iquote '

 iquoteend=''