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>

 # To be sourced

 _ct-ng () {

     local cur prev samples show_samples actions steps start_steps stop_steps ct_ng_opts vars

     COMPREPLY=()

     cur=$(_get_cword)

     prev=${COMP_WORDS[COMP_CWORD-1]}

     samples=$( "${COMP_WORDS[0]}" list-samples-short 2>/dev/null )

     show_samples=$(echo "${samples}" |sed -r -e 's/(^| )/\1show-/g;')

     build_samples=$(echo "${samples}" |sed -r -e 's/(^| )/\1build-/g;')

     steps=$(${COMP_WORDS[0]} list-steps 2>/dev/null |awk '$1 == "-" { print $2; }')

     start_steps=$(echo "${steps}" |sed -r -e 's/($| )/\1+/;')

     stop_steps=$(echo "${steps}" |sed -r -e 's/(^| )/+\1/;')

     actions='help menuconfig oldconfig saveconfig extractconfig

              build build. build-all build-all.

              wiki-samples list-samples list-samples-short list-steps

              show-tuple show-all show-config

              clean distclean updatetools

              tarball version'

     vars="RESTART= STOP= PREFIX= V="

     ct_ng_opts="${samples} ${show_samples} ${build_samples}

                 ${steps} ${start_steps} ${stop_steps}

                 ${actions} ${vars}"

     COMPREPLY=($(compgen -W "${ct_ng_opts}" -- "${cur}"))

     return 0

 }

 complete -F _ct-ng ct-ng