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)

 --- glibc-2.5/sysdeps/unix/sysv/linux/alpha/sigsuspend.S.orig	2006-10-22 22:17:01.000000000 +0200

 +++ glibc-2.5/sysdeps/unix/sysv/linux/alpha/sigsuspend.S	2006-10-22 22:18:05.000000000 +0200

 @@ -31,3 +31,21 @@

  libc_hidden_def (__sigsuspend)

  weak_alias (__sigsuspend, sigsuspend)

  strong_alias (__sigsuspend, __libc_sigsuspend)

 +

 +#ifndef NO_CANCELLATION

 +	.globl __sigsuspend_nocancel;

 +	.align 4;

 +	.type __sigsuspend_nocancel, @function;

 +	.usepv __sigsuspend_nocancel, std;

 +	cfi_startproc;

 +__LABEL(__sigsuspend_nocancel)

 +	ldgp    gp, 0(pv);

 +	PSEUDO_PROF;

 +	PSEUDO_PREPARE_ARGS

 +	lda     v0, SYS_ify(sigsuspend);

 +	call_pal PAL_callsys;

 +	bne     a3, SYSCALL_ERROR_LABEL;

 +	ret;

 +	cfi_endproc;

 +	.size __sigsuspend_nocancel, .-__sigsuspend_nocancel

 +#endif