Fix bootstrap on Darwin 10.11

[Jonathan Perkin <jperkin%joyent.com@localhost>]

Hi,

As per the "Rebootstrapped on Darwin" thread, it appears that we still
require nbsed when building on El Capitan if the user is using a non-C
locale, otherwise builds will fail.

The diff to fix this is below and, given the narrow scope and the
benefit it provides, I would like to commit it during the freeze.

===================================================================
RCS file: /cvsroot/pkgsrc/bootstrap/bootstrap,v
--- bootstrap/bootstrap	11 Dec 2015 23:55:44 -0000	1.222
+++ bootstrap/bootstrap	18 Dec 2015 13:21:46 -0000
@@ -572,7 +572,7 @@
 		;;
 	esac
 	case "$macosx_version" in
-	10.[8-9]|10.10)
+	10.[8-9]|10.1[01])
 		need_awk=yes
 		need_sed=yes
 		;;
===================================================================

Ok to commit?

Thanks,

-- 
Jonathan Perkin  -  Joyent, Inc.  -  www.joyent.com