ustr: comma separate licenses

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

package/ustr/ustr.mk

@@ -7,7 +7,7 @@
 USTR_VERSION = 1.0.4
 USTR_SOURCE = ustr-$(USTR_VERSION).tar.bz2
 USTR_SITE = http://www.and.org/ustr/$(USTR_VERSION)
-USTR_LICENSE = BSD-2c MIT LGPLv2+
+USTR_LICENSE = BSD-2c, MIT, LGPLv2+
 USTR_LICENSE_FILES = LICENSE LICENSE_BSD LICENSE_LGPL LICENSE_MIT
 USTR_AUTORECONF = YES
 USTR_PATCH = \