get rid of lkmc package, move userland and kernel-modules to top

Rationale: we already had a non buildroot build system,
maintaining both will be hard, and having short paths is more awesome.

kernel_modules/init_module.c

@@ -0,0 +1,16 @@
+/* https://github.com/cirosantilli/linux-kernel-module-cheat#init_module */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+
+int init_module(void)
+{
+	pr_info("init_module\n");
+	return 0;
+}
+
+void cleanup_module(void)
+{
+	pr_info("cleanup_module\n");
+}
+MODULE_LICENSE("GPL");