user: implement mlibc as the libc, finally.

It's finally done..

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

src/arch/x86_64/sys/apic.c

@@ -138,7 +138,7 @@ void lapic_init(void) {
      * ── Step 8: Set Task Priority to 0 ───────────────────────────────────
      *
      * TPR = 0 means the CPU will accept all interrupt priorities.
-     * Raise this later if you need to block lower-priority interrupts.
+     * Raise this later if need to block lower-priority interrupts.
      */
     lapic_write(LAPIC_TPR, 0);