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 file adds the functions to build the GCC test suite

 # Copyright 2010 DoréDevelopment

 # Created by Martin Lund <mgl@doredevelopment.dk>

 # Licensed under the GPL v2. See COPYING in the root of this package

 do_test_suite_gcc_get() { :; }

 do_test_suite_gcc_extract() { :; }

 do_test_suite_gcc_build() { :; }

 # Overide functions depending on configuration

 if [ "${CT_TEST_SUITE_GCC}" = "y" ]; then

 do_test_suite_gcc_build() {

     CT_DoStep INFO "Installing GCC test suite"

     CT_DoExecLog ALL mkdir -p "${CT_TEST_SUITE_DIR}/gcc"

     CT_DoExecLog ALL cp -av "${CT_LIB_DIR}/contrib/gcc-test-suite/default.cfg"  \

                             "${CT_LIB_DIR}/contrib/gcc-test-suite/Makefile"     \

                             "${CT_LIB_DIR}/contrib/gcc-test-suite/README"       \

                             "${CT_SRC_DIR}/gcc-${CT_CC_VERSION}/gcc/testsuite"  \

                             "${CT_TEST_SUITE_DIR}/gcc"

     CT_DoExecLog ALL sed -i -r -e "s/@@DG_TARGET@@/${CT_TARGET}/g;"     \

                          "${CT_TEST_SUITE_DIR}/gcc/Makefile"

     CT_EndStep

 }

 fi # CT_TEST_SUITE_GCC