Introduce #include <tinygetopt.h>

The normal getopt() function is bloated because it links printf(). This
change exports the original authentic bsd getopt function, that cosmo's
always used internally so cosmocc users don't need to include internals

Author: jart

libc/isystem/tinygetopt.h

@@ -0,0 +1 @@
+#include "third_party/getopt/getopt.internal.h"

third_party/getopt/getopt.internal.h

@@ -16,7 +16,7 @@ COSMOPOLITAN_C_START_
 extern char *optarg;
 extern int optind, opterr, optopt, optreset;
 
-int getopt(int, char *const[], const char *) paramsnonnull();
+int getopt(int, char *const[], const char *) paramsnonnull() libcesque;
 
 COSMOPOLITAN_C_END_
 #endif /* COSMOPOLITAN_GETOPT_H_ */