user: implement mlibc as the libc, finally.

It's finally done..

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

ext2_root/usr/include/bits/glibc/glibc_stdlib.h

@@ -0,0 +1,20 @@
+#ifndef MLIBC_GLIBC_STDLIB_H
+#define MLIBC_GLIBC_STDLIB_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef int (*comparison_fn_t) (const void *__a, const void *__b);
+
+#ifndef __MLIBC_ABI_ONLY
+
+int rpmatch(const char *__resp);
+
+#endif /* !__MLIBC_ABI_ONLY */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* MLIBC_GLIBC_STDLIB_H */