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>

 --- glibc-2.7/sysdeps/unix/sysv/linux/sh/sysdep.S.orig	2005-12-30 22:16:43.000000000 +0000

 +++ glibc-2.7/sysdeps/unix/sysv/linux/sh/sysdep.S	2008-08-19 22:33:14.000000000 +0100

 @@ -32,3 +32,13 @@

  #define __syscall_error __syscall_error_1

  #include <sysdeps/unix/sh/sysdep.S>

 +

 +	.data

 +	.align 3

 +	.globl ___fpscr_values

 +	.type ___fpscr_values, @object

 +	.size ___fpscr_values, 8

 +___fpscr_values:

 +	.long	0

 +	.long	0x80000

 +weak_alias (___fpscr_values, __fpscr_values)

 --- glibc-2.7/sysdeps/unix/sysv/linux/sh/Versions.orig	2003-09-01 05:05:09.000000000 +0100

 +++ glibc-2.7/sysdeps/unix/sysv/linux/sh/Versions	2008-08-19 22:33:14.000000000 +0100

 @@ -2,6 +2,7 @@

    GLIBC_2.2 {

      # functions used in other libraries

      __xstat64; __fxstat64; __lxstat64;

 +    __fpscr_values;

      # a*

      alphasort64;