sys: add ld runtime linker

sys/ld/main.c

@@ -0,0 +1,13 @@
+#include <mango/log.h>
+#include <mango/types.h>
+
+int main(
+	int argc,
+	const char **argv,
+	kern_handle_t task,
+	kern_handle_t address_space,
+	uintptr_t bsp_base)
+{
+	kern_log("ld!");
+	return 0;
+}