aarch64, fix gdb with linux-custom

rungdb

@@ -23,7 +23,7 @@ fi
 
 buildroot_out_dir="$(pwd)/buildroot/output.${arch}~"
 gdb="${buildroot_out_dir}/host/usr/bin/${arch}-linux-gdb"
-cd "${buildroot_out_dir}/build"/linux-?.*.*/
+cd "${buildroot_out_dir}/build"/linux-custom/
 if "$kgdb"; then
     cmd="$gdb \
       -q \
@@ -51,7 +51,7 @@ else
         -ex 'lx-symbols ../kernel_module-1.0/'
       "
     ;;
-    'arm'|'mips64')
+    'arm'|'aarch64'|'mips64')
       cmd="$gdb \
         -q \
         -ex 'add-auto-load-safe-path $(pwd)' \
@@ -63,4 +63,5 @@ else
     ;;
   esac
 fi
+echo "$cmd"
 eval "$cmd"