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>

 This patch sets the page size to a default 12, that is a 4KiB block size.

 Testing for the correct block-size is impossible when cross-compiling.

 It was build up by Yann E. MORIN <yann.morin.1998@anciens.enib.fr> from some

 bits gathered from buildroot, which is LGPL v2.1

 License for dmalloc is:

  * Permission to use, copy, modify, and distribute this software for

  * any purpose and without fee is hereby granted, provided that the

  * above copyright notice and this permission notice appear in all

  * copies, and that the name of Gray Watson not be used in advertising

  * or publicity pertaining to distribution of the document or software

  * without specific, written prior permission.

  *

  * Gray Watson makes no representations about the suitability of the

  * software described herein for any purpose.  It is provided "as is"

  * without express or implied warranty.

 I personnaly believe that the resulting code should therefore be

 LGPL v2.1, but don't believe me, ask your lawyers!

 diff -dur dmalloc-5.5.2.orig/configure dmalloc-5.5.2/configure

 --- dmalloc-5.5.2.orig/configure	2007-05-14 19:26:14.000000000 +0200

 +++ dmalloc-5.5.2/configure	2007-05-18 11:38:25.000000000 +0200

 @@ -5306,7 +5306,7 @@

  echo "$as_me:$LINENO: checking basic-block size" >&5

  echo $ECHO_N "checking basic-block size... $ECHO_C" >&6

 -ac_cv_page_size=0

 +ac_cv_page_size=12

  if test $ac_cv_page_size = 0; then

     if test "$cross_compiling" = yes; then

    { { echo "$as_me:$LINENO: error: cannot run test program while cross compiling