Add epoll and do more release readiness changes

This change also pays off some of the remaining technical debt with
stdio, file descriptors, and memory managemnt polyfills.

libc/notice.internal.h

@@ -0,0 +1,12 @@
+#ifndef COSMOPOLITAN_LIBC_INTERNAL_NOTICE_H_
+#define COSMOPOLITAN_LIBC_INTERNAL_NOTICE_H_
+#ifndef __STRICT_ANSI__
+
+#ifdef __ASSEMBLER__
+.include "libc/notice.inc"
+#else
+asm(".include \"libc/notice.inc\"");
+#endif
+
+#endif /* !ANSI */
+#endif /* COSMOPOLITAN_LIBC_INTERNAL_NOTICE_H_ */