Update libc

libc/src/dlfcn.c

@@ -0,0 +1,23 @@
+#include <dlfcn.h>
+
+static char *error = "Not implemented";
+
+__attribute__((weak)) void *dlopen(const char *filename, int flags)
+{
+    return NULL;
+}
+
+__attribute__((weak)) void *dlsym(void *handle, const char *symbol)
+{
+    return NULL;
+}
+
+__attribute__((weak)) int dlclose(void *handle)
+{
+    return -1;
+}
+
+__attribute__((weak)) char *dlerror(void)
+{
+    return error;
+}