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>

diff -durN glibc-2.13.orig/sysdeps/unix/sysv/linux/kernel-features.h glibc-2.13/sysdeps/unix/sysv/linux/kernel-features.h

--- glibc-2.13.orig/sysdeps/unix/sysv/linux/kernel-features.h	2009-05-09 08:54:20.000000000 +0200

+++ glibc-2.13/sysdeps/unix/sysv/linux/kernel-features.h	2009-11-13 00:50:45.000000000 +0100

@@ -386,6 +386,11 @@

 # define __ASSUME_GETDENTS32_D_TYPE	1

 #endif

+/* Starting with version 2.6.4, alpha stat64 syscalls are available.  */

+#if __LINUX_KERNEL_VERSION >= 0x020604 && defined __alpha__

+# define __ASSUME_STAT64_SYSCALL	1

+#endif

+

 /* Starting with version 2.5.3, the initial location returned by `brk'

    after exec is always rounded up to the next page.  */

 #if __LINUX_KERNEL_VERSION >= 132355