add LTTng recipes (fixed ARM arc. bug)

	new file:   recipes-kernel/lttng/lttng-modules/LTTng_system_call_tracing_on_ARM.patch
	new file:   recipes-kernel/lttng/lttng-modules/lttng-modules-replace-KERNELDIR-with-KERNEL_SRC.patch
	new file:   recipes-kernel/lttng/lttng-modules_2.1.3.bb