user: implement mlibc as the libc, finally.

It's finally done..

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

user/include/mlibc/tests/rtld/destroy1/meson.build

@@ -0,0 +1 @@
+# only the test executable is required

user/include/mlibc/tests/rtld/destroy1/test.c

@@ -0,0 +1,9 @@
+#include <unistd.h>
+
+__attribute__((destructor)) void destroy() {
+	_exit(0);
+}
+
+int main() {
+	return 1;
+}