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)

# Wrapper to build the debug facilities

# List all debug facilities, and parse their scripts

CT_DEBUG_FACILITY_LIST=

for f in "${CT_LIB_DIR}/scripts/build/debug/"*.sh; do

    _f="$(basename "${f}" .sh)"

    _f="${_f#???-}"

    __f="CT_DEBUG_${_f}"

    if [ "${!__f}" = "y" ]; then

        CT_DoLog DEBUG "Enabling debug '${_f}'"

        . "${f}"

        CT_DEBUG_FACILITY_LIST="${CT_DEBUG_FACILITY_LIST} ${_f}"

    else

        CT_DoLog DEBUG "Disabling debug '${_f}'"

    fi

done

# Download the debug facilities

do_debug_get() {

    for f in ${CT_DEBUG_FACILITY_LIST}; do

        do_debug_${f}_get

    done

}

# Extract and patch the debug facilities

do_debug_extract() {

    for f in ${CT_DEBUG_FACILITY_LIST}; do

        do_debug_${f}_extract

    done

}

# Build the debug facilities

do_debug() {

    for f in ${CT_DEBUG_FACILITY_LIST}; do

        do_debug_${f}_build

    done

}