user: implement mlibc as the libc, finally.

It's finally done..

Signed-off-by: kaguya <vpshinomiya@protonmail.com>

user/include/mlibc/sysdeps/ironclad/generic/ptrace.cpp

@@ -0,0 +1,9 @@
+#include <sys/syscall.h>
+#include <errno.h>
+#include <sys/ptrace.h>
+
+int ptrace(int request, pid_t pid, void *addr, void *data) {
+	int ret;
+	SYSCALL4(SYSCALL_PTRACE, request, pid, addr, data);
+	return ret;
+}