package/imx-lib: fix legal-info

The new version of imx-lib no longer bears the EULA file, and has no
other license file.

So, we pick a small header as the license file.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Gary Bisson <gary.bisson@boundarydevices.com>
Acked-by: Gary Bisson <gary.bisson@boundarydevices.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/freescale-imx/imx-lib/imx-lib.mk

@@ -7,7 +7,7 @@
 IMX_LIB_VERSION = $(FREESCALE_IMX_VERSION)
 IMX_LIB_SITE = $(FREESCALE_IMX_SITE)
 IMX_LIB_LICENSE = LGPLv2.1+
-IMX_LIB_LICENSE_FILES = EULA
+IMX_LIB_LICENSE_FILES = pxp/pxp_lib.h
 
 IMX_LIB_INSTALL_STAGING = YES