sudo: fix musl build: uid_t is defined in unistd.h (from chris2).

srcpkgs/sudo/patches/uid_t_needs_unistd.h.patch

@@ -0,0 +1,10 @@
+--- include/sudo_compat.h.orig	2015-03-17 11:02:15.190461995 +0100
++++ include/sudo_compat.h	2015-03-17 11:02:36.493190547 +0100
+@@ -27,6 +27,7 @@
+ # include <stddef.h>
+ #endif
+ #include <stdarg.h>
++#include <unistd.h>
+ 
+ /*
+  * Macros and functions that may be missing on some operating systems.

srcpkgs/sudo/template

@@ -1,7 +1,7 @@
 # Template build file for 'sudo'.
 pkgname=sudo
 version=1.8.12
-revision=2
+revision=3
 lib32disabled=yes
 build_style=gnu-configure
 configure_args="--with-ignore-dot -with-all-insults --with-env-editor