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>

--- binutils-2.20/ld/configure.tgt.orig	2010-02-20 04:05:31.000000000 -0500

+++ binutils-2.20/ld/configure.tgt	2010-02-20 04:08:11.000000000 -0500

@@ -400,11 +400,11 @@

 mips*-*-vxworks*)	targ_emul=elf32ebmipvxworks

 		        targ_extra_emuls="elf32elmipvxworks" ;;

 mips*-*-windiss)	targ_emul=elf32mipswindiss ;;

-mips64*el-*-linux-*)	targ_emul=elf32ltsmipn32

-			targ_extra_emuls="elf32btsmipn32 elf32ltsmip elf32btsmip elf64ltsmip elf64btsmip"

+mips64*el-*-linux-*)	targ_emul=elf64ltsmip

+			targ_extra_emuls="elf32ltsmipn32 elf32btsmipn32 elf32ltsmip elf32btsmip elf64btsmip"

 			targ_extra_libpath=$targ_extra_emuls ;;

-mips64*-*-linux-*)	targ_emul=elf32btsmipn32

-			targ_extra_emuls="elf32ltsmipn32 elf32btsmip elf32ltsmip elf64btsmip elf64ltsmip"

+mips64*-*-linux-*)	targ_emul=elf64btsmip

+			targ_extra_emuls="elf32btsmipn32 elf32ltsmipn32 elf32btsmip elf32ltsmip elf64ltsmip"

 			targ_extra_libpath=$targ_extra_emuls ;;

 mips*el-*-linux-*)	targ_emul=elf32ltsmip

 			targ_extra_emuls="elf32btsmip elf32ltsmipn32 elf64ltsmip elf32btsmipn32 elf64btsmip"