More portability updates. Now compiles cleanly vs glibc, libc5, and uclibc

(except for mkfs_minix and fsck_minix -- and it doesn't yet link vs uclibc due
to missing stuff in the library).
 -Erik

coreutils/uudecode.c

@@ -55,6 +55,7 @@
 
 #include <stdio.h>
 #include <errno.h>
+#include <getopt.h>
 #include <pwd.h>
 
 /*struct passwd *getpwnam();*/