package/asterisk: replace BSD-{3,4}c

Replace BSD-{3,4}c by BSD-{3,4}-Clause

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit e22572d1a109f4010c552d72e91da86a3fd1e3fa)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/asterisk/asterisk.mk

@@ -14,7 +14,7 @@ ASTERISK_EXTRA_DOWNLOADS = \
 	$(ASTERISK_SOUNDS_BASE_URL)/asterisk-core-sounds-en-gsm-1.6.1.tar.gz \
 	$(ASTERISK_SOUNDS_BASE_URL)/asterisk-moh-opsound-wav-2.03.tar.gz
 
-ASTERISK_LICENSE = GPL-2.0, BSD-3c (SHA1, resample), BSD-4c (db1-ast)
+ASTERISK_LICENSE = GPL-2.0, BSD-3-Clause (SHA1, resample), BSD-4-Clause (db1-ast)
 ASTERISK_LICENSE_FILES = \
 	COPYING \
 	main/sha1.c \