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>

 --- uClibc-0.9.30.orig/extra/scripts/unifdef.c	2008-04-28 01:10:00.000000000 +0200

 +++ uClibc-0.9.30/extra/scripts/unifdef.c	2011-08-21 09:42:21.000000000 +0200

 @@ -206,7 +206,7 @@

  static void             error(const char *);

  static int              findsym(const char *);

  static void             flushline(bool);

 -static Linetype         getline(void);

 +static Linetype         getlinetype(void);

  static Linetype         ifeval(const char **);

  static void             ignoreoff(void);

  static void             ignoreon(void);

 @@ -512,7 +512,7 @@

  	for (;;) {

  		linenum++;

 -		lineval = getline();

 +		lineval = getlinetype();

  		trans_table[ifstate[depth]][lineval]();

  		debug("process %s -> %s depth %d",

  		    linetype_name[lineval],

 @@ -526,7 +526,7 @@

   * help from skipcomment().

   */

  static Linetype

 -getline(void)

 +getlinetype(void)

  {

  	const char *cp;

  	int cursym;