contrib: no need to build the whole of twolame

extras/contrib/src/Makefile

@@ -1657,7 +1657,7 @@ ifdef HAVE_WIN32
 endif
 
 .twolame: twolame
-	(cd twolame; $(HOSTCC) CFLAGS="${CFLAGS}  -DLIBTWOLAME_STATIC" ./configure $(HOSTCONF) --prefix=$(PREFIX) &&  make && make install)
+	(cd twolame; $(HOSTCC) CFLAGS="${CFLAGS}  -DLIBTWOLAME_STATIC" ./configure $(HOSTCONF) --prefix=$(PREFIX) &&  cd libtwolame && make && make install && cd .. && make install-data)
 	$(INSTALL_NAME)
 	touch $@