lttng-modules: comma separate licenses

[Thomas: put between parenthesis the description of what is covered by
each license.]

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/lttng-modules/lttng-modules.mk

@@ -7,7 +7,7 @@
 LTTNG_MODULES_VERSION = 2.7.0
 LTTNG_MODULES_SITE = http://lttng.org/files/lttng-modules
 LTTNG_MODULES_SOURCE = lttng-modules-$(LTTNG_MODULES_VERSION).tar.bz2
-LTTNG_MODULES_LICENSE = LGPLv2.1/GPLv2 for kernel modules; MIT for lib/bitfield.h and lib/prio_heap/*
+LTTNG_MODULES_LICENSE = LGPLv2.1/GPLv2 (kernel modules), MIT (lib/bitfield.h, lib/prio_heap/*)
 LTTNG_MODULES_LICENSE_FILES = lgpl-2.1.txt gpl-2.0.txt mit-license.txt LICENSE
 
 $(eval $(kernel-module))