AK3: fix support for forced uncompressed cpio ramdisk repacks

- resolves https://github.com/osm0sis/AnyKernel3/commit/698682123053cab9e3277c9c9df783a97b3e8958 "IMPORTANT NOTE" 1

tools/ak3-core.sh

@@ -209,7 +209,7 @@ repack_ramdisk() {
 
 # flash_boot (build, sign and write image only)
 flash_boot() {
-  local varlist kernel ramdisk cmdline part0 part1 signfail pk8 cert avbtype;
+  local varlist kernel ramdisk cmdline part0 part1 nocompflag signfail pk8 cert avbtype;
 
   cd $split_img;
   if [ -f "$bin/mkimage" ]; then
@@ -287,7 +287,10 @@ flash_boot() {
     for i in dtb recovery_dtbo; do
       test "$(eval echo \$$i)" -a -f $i && cp -f $(eval echo \$$i) $i;
     done;
-    $bin/magiskboot repack $bootimg $home/boot-new.img;
+    case $ramdisk_compression in
+      none|cpio) nocompflag="-n";;
+    esac;
+    $bin/magiskboot repack $nocompflag $bootimg $home/boot-new.img;
   fi;
   if [ $? != 0 ]; then
     abort "Repacking image failed. Aborting...";