complibs/cloog: fix linking with libm

In Ubuntu 11.04 and 11.10, the default options for ld have changed.
--no-copy-dt-needed-entries and --as-needed are now enabled by default, which
causes errors like:

[EXTRA] Checking CLooG/ppl
[DEBUG] ==> Executing: 'make' '-j3' '-s' 'check'
[ALL ] Making check in .
[ALL ] config.status: creating include/cloog/cloog-config.h
[ALL ] config.status: include/cloog/cloog-config.h is unchanged
[ALL ] libtool: link: i686-build_pc-linux-gnu-gcc -Wall -fomit-frame-pointer
-pipe -o cloog cloog.o -L/<snip>/build/static/lib ./.libs/libcloog.a -lm
/<snip>/build/static/lib/libppl_c.a /<snip>/build/static/lib/libpwl.a
/<snip>/build/static/lib/libppl.a /<snip>/build/static/lib/libgmpxx.a
/<snip>/build/static/lib/libgmp.a -lstdc++
[ALL ] /usr/bin/ld: /<snip>/build/static/lib/libppl.a(MIP_Problem.o):
undefined reference to symbol 'sqrt@@GLIBC_2.0'
[ALL ] /usr/bin/ld: note: 'sqrt@@GLIBC_2.0' is defined in DSO
/usr/lib/gcc/i686-linux-gnu/4.6.1/../../../i386-linux-gnu/libm.so so try adding
it to the linker command line
[ALL ] /usr/lib/gcc/i686-linux-gnu/4.6.1/../../../i386-linux-gnu/libm.so:
could not read symbols: Invalid operation
[ALL ] collect2: ld returned 1 exit status
[ERROR] make[2]: *** [cloog] Error 1
[ERROR] make[1]: *** [check-recursive] Error 1

See:
https://wiki.ubuntu.com/NattyNarwhal/ToolchainTransition

This patch fixes these errors by placing '-lm' at the right place on the command
line as libppl requires libm when linking cloog.

Signed-off-by: "Benoît Thébaudeau" <benoit.thebaudeau@advansee.com>

 Original patch from: gentoo/src/patchsets/glibc/2.9/1160_all_glibc-2.8-nscd-one-fork.patch

 -= BEGIN original header =-

 only fork one to assist in stop-start-daemon assumptions about daemon behavior

 http://bugs.gentoo.org/190785

 -= END original header =-

 diff -durN glibc-2_9.orig/nscd/nscd.c glibc-2_9/nscd/nscd.c

 --- glibc-2_9.orig/nscd/nscd.c	2008-03-29 19:08:12.000000000 +0100

 +++ glibc-2_9/nscd/nscd.c	2009-02-02 22:01:10.000000000 +0100

 @@ -179,6 +179,9 @@

        if (pid != 0)

  	exit (0);

 +       if (write_pid (_PATH_NSCDPID) < 0)

 +	dbg_log ("%s: %s", _PATH_NSCDPID, strerror (errno));

 +

        int nullfd = open (_PATH_DEVNULL, O_RDWR);

        if (nullfd != -1)

  	{

 @@ -228,12 +231,6 @@

  	for (i = min_close_fd; i < getdtablesize (); i++)

  	  close (i);

 -      pid = fork ();

 -      if (pid == -1)

 -	error (EXIT_FAILURE, errno, _("cannot fork"));

 -      if (pid != 0)

 -	exit (0);

 -

        setsid ();

        if (chdir ("/") != 0)

 @@ -242,9 +239,6 @@

        openlog ("nscd", LOG_CONS | LOG_ODELAY, LOG_DAEMON);

 -      if (write_pid (_PATH_NSCDPID) < 0)

 -        dbg_log ("%s: %s", _PATH_NSCDPID, strerror (errno));

 -

        if (!init_logfile ())

  	dbg_log (_("Could not create log file"));