daemonize: fix build (#476400)

diff --git a/getopt.c b/getopt.c

index 9b27812..3fac396 100644

--- a/getopt.c

+++ b/getopt.c

@@ -43,9 +43,9 @@

 #include <stdio.h>

 /* We're ANSI now; we're guaranteed to have strchr(). */

 #include <string.h>

+#include <unistd.h>

 #define ERR(s, c)	if(x_opterr){\

-	extern int write();\

 	char errbuf[2];\

 	errbuf[0] = c; errbuf[1] = '\n';\

 	(void) write(2, argv[0], (unsigned)strlen(argv[0]));\

    sha256 = "1e6LZXf/lK7sB2CbXwOg7LOi0Q8IBQNAa4d7rX0Ej3A=";

  };

  patches = [

    # conbination of:

    # https://github.com/bmc/daemonize/commit/eaf4746d47e171e7b8655690eb1e91fc216f2866

    # https://github.com/bmc/daemonize/pull/39

    ./include-write-prototype.patch

  ];

  meta = {

    description = "Runs a command as a Unix daemon";

    homepage = "http://software.clapper.org/daemonize/";