user: implement mlibc as the libc, finally.

It's finally done..

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

user/include/mlibc/options/linux/generic/sys-swap.cpp

@@ -0,0 +1,24 @@
+#include <errno.h>
+#include <sys/swap.h>
+
+#include <bits/ensure.h>
+#include <mlibc/debug.hpp>
+#include <mlibc/linux-sysdeps.hpp>
+
+int swapon(const char *path, int flags) {
+	MLIBC_CHECK_OR_ENOSYS(mlibc::sys_swapon, -1);
+	if(int e = mlibc::sys_swapon(path, flags); e) {
+		errno = e;
+		return -1;
+	}
+	return 0;
+}
+
+int swapoff(const char *path) {
+	MLIBC_CHECK_OR_ENOSYS(mlibc::sys_swapoff, -1);
+	if(int e = mlibc::sys_swapoff(path); e) {
+		errno = e;
+		return -1;
+	}
+	return 0;
+}