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>

If we're using a cvs snapshot which updates the source files, and

perl isn't installed yet, then we can't regen the docs.  Not a big

deal, so just whine a little and continue on our merry way.

http://bugs.gentoo.org/60132

diff -durN glibc-2.13.orig/manual/Makefile glibc-2.13/manual/Makefile

--- glibc-2.13.orig/manual/Makefile	2006-01-08 07:43:47.000000000 +0100

+++ glibc-2.13/manual/Makefile	2009-11-13 00:49:54.000000000 +0100

@@ -104,9 +104,14 @@

 libm-err.texi: stamp-libm-err

 stamp-libm-err: libm-err-tab.pl $(wildcard $(foreach dir,$(sysdirs),\

 						     $(dir)/libm-test-ulps))

+ifneq ($(PERL),no)

 	pwd=`pwd`; \

 	$(PERL) $< $$pwd/.. > libm-err-tmp

 	$(move-if-change) libm-err-tmp libm-err.texi

+else

+	echo "Unable to rebuild math docs, no perl installed"

+	touch libm-err.texi

+endif

 	touch $@

 # Generate Texinfo files from the C source for the example programs.