user: implement mlibc as the libc, finally.

It's finally done..

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

user/include/mlibc/options/glibc/generic/getopt.cpp

@@ -0,0 +1,12 @@
+#include <getopt.h>
+#include <mlibc/getopt.hpp>
+
+int getopt_long(int argc, char * const argv[], const char *optstring,
+		const struct option *longopts, int *longindex) {
+	return getopt_common(argc, argv, optstring, longopts, longindex, mlibc::GetoptMode::Long);
+}
+
+int getopt_long_only(int argc, char * const argv[], const char *optstring,
+		const struct option *longopts, int *longindex) {
+	return getopt_common(argc, argv, optstring, longopts, longindex, mlibc::GetoptMode::LongOnly);
+}