mtdev2tuio: fix static linking

Liblo uses log(3), so we need to link with -lm when linking statically.

Fixes http://autobuild.buildroot.net/results/bec/becda4756c577ec158536408aba59797fbed938a/

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/mtdev2tuio/mtdev2tuio.mk

@@ -11,11 +11,12 @@ MTDEV2TUIO_LICENSE = GPLv3+
 MTDEV2TUIO_LICENSE_FILES = COPYING
 
 # mtdev2tuio Makefile misuses $(LD) as gcc, so we need to override LD
-# here.
+# here. Liblo uses log(3), so we need to link with -lm
 define MTDEV2TUIO_BUILD_CMDS
 	$(MAKE) \
 		$(TARGET_CONFIGURE_OPTS) \
 		LD="$(TARGET_CC)" \
+		LIBS="-lmtdev -llo -lm" \
 		-C $(@D)
 endef