Include RC versions

pkgkernel.sh

@@ -2,8 +2,15 @@
 
 GREEN='\033[0;32m'
 DEFAULT='\033[0m'
+PREFIX='linux-'
 EXTENSION='.tar.xz'
-KERNEL=$(echo ${1}|cut -d"-" -f 2)
+# For RC releases
+if [ `expr index ${1} gz` -gt 0 ] ; then 
+    EXTENSION='.tar.gz'
+fi
+
+KERNEL=${1}
+KERNEL=${KERNEL#$PREFIX}
 # Get kernel version from argument
 KERNEL=${KERNEL%$EXTENSION}