kclient: add missing armor.c symlink

diff --git a/src/kernel/armor.c b/src/kernel/armor.c
new file mode 120000 (symlink)
index 0000000..eef14ba
--- /dev/null
+++ b/src/kernel/armor.c
@@ -0,0 +1 @@
+../common/armor.c
\ No newline at end of file