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>

 diff --git a/mpn/generic/toom44_mul.c b/mpn/generic/toom44_mul.c

 --- a/mpn/generic/toom44_mul.c

 +++ b/mpn/generic/toom44_mul.c

 @@ -116,17 +116,16 @@

    TMP_MARK;

 -  as1  = TMP_SALLOC_LIMBS (n + 1);

 -  asm1 = TMP_SALLOC_LIMBS (n + 1);

 -  as2  = TMP_SALLOC_LIMBS (n + 1);

 -  ash  = TMP_SALLOC_LIMBS (n + 1);

 -  asmh = TMP_SALLOC_LIMBS (n + 1);

 -

 -  bs1  = TMP_SALLOC_LIMBS (n + 1);

 -  bsm1 = TMP_SALLOC_LIMBS (n + 1);

 -  bs2  = TMP_SALLOC_LIMBS (n + 1);

 -  bsh  = TMP_SALLOC_LIMBS (n + 1);

 -  bsmh = TMP_SALLOC_LIMBS (n + 1);

 +  as1  = TMP_ALLOC_LIMBS (10 * n + 10);

 +  asm1 = as1  + n + 1;

 +  as2  = asm1 + n + 1;

 +  ash  = as2  + n + 1;

 +  asmh = ash  + n + 1;

 +  bs1  = asmh + n + 1;

 +  bsm1 = bs1  + n + 1;

 +  bs2  = bsm1 + n + 1;

 +  bsh  = bs2  + n + 1;

 +  bsmh = bsh  + n + 1;

    gp = pp;

    hp = pp + n + 1;