Added -lm when linking nettle-benchmark.

ChangeLog

 2012-07-07  Niels Möller  <nisse@lysator.liu.se>
 
+	* examples/Makefile.in (BENCH_LIBS): Added -lm, needed for the
+	ldexp function. Reported by Anthony G. Basile.
+
 	* configure.ac: Changed version number to 2.6.
 
 	* Released nettle-2.5.

examples/Makefile.in

@@ -11,7 +11,7 @@ PRE_CPPFLAGS = -I.. -I$(top_srcdir)
 PRE_LDFLAGS = -L..
 
 OPENSSL_LIBFLAGS = @OPENSSL_LIBFLAGS@
-BENCH_LIBS = @BENCH_LIBS@
+BENCH_LIBS = @BENCH_LIBS@ -lm
 
 RSA_TARGETS = rsa-keygen$(EXEEXT) rsa-sign$(EXEEXT) \
 	      rsa-verify$(EXEEXT) rsa-encrypt$(EXEEXT) rsa-decrypt$(EXEEXT)