xbps-src: require sudo to build packages.

The reason is that fakeroot can't read files that have restrictive
perms and you'd have to change them before the src installation, and
restoring them at binpkg pre-installation.

I prefer to avoid all this and build the pkg with appropiate perms.

--HG--
extra : convert_revision : 8a5086049ab575962913eda0cb2ace0c211b97f1

templates/sudo/template

@@ -32,8 +32,4 @@ session     optional	    pam_xauth.so
 session     required        pam_env.so
 session     required        pam_unix.so
 _EOF
-	chmod 644 $destdir/etc/pam.d/sudo
-	chmod 644 $destdir/usr/libexec/sudo/sudo_noexec.so
-	chmod 755 $destdir/usr/bin/sudo* $destdir/usr/sbin/visudo
-	chmod 644 $destdir/etc/sudoers
 }