Use GNU_MIRROR for libcgicc since www.cgicc.org is gone, change bz2 to gz and bump version

package/libcgicc/libcgicc.mk

@@ -4,11 +4,11 @@
 #
 #############################################################
 
-LIBCGICC_VERSION=3.2.3
+LIBCGICC_VERSION=3.2.7
 LIBCGICC_DIR=$(BUILD_DIR)/cgicc-$(LIBCGICC_VERSION)
-LIBCGICC_SITE=http://www.cgicc.org/files
-LIBCGICC_SOURCE=cgicc-$(LIBCGICC_VERSION).tar.bz2
-LIBCGICC_CAT:=$(BZCAT)
+LIBCGICC_SITE=$(BR2_GNU_MIRROR)/cgicc
+LIBCGICC_SOURCE=cgicc-$(LIBCGICC_VERSION).tar.gz
+LIBCGICC_CAT:=$(ZCAT)
 
 $(DL_DIR)/$(LIBCGICC_SOURCE):
 	$(WGET) -P $(DL_DIR) $(LIBCGICC_SITE)/$(LIBCGICC_SOURCE)