lttng-tools: fix build failure with libkmod (closes: #1004)

Signed-off-by: Nicolas Thill <nico@openwrt.org>

devel/lttng-tools/Makefile

@@ -34,6 +34,8 @@ define Package/lttng-tools
   DEPENDS:= +lttng-ust +libpopt +libxml2
 endef
 
+CONFIGURE_ARGS += --disable-kmod
+
 TARGET_LDFLAGS += -lurcu-bp
 
 MAKE_FLAGS += V="$(V)"